This сase requires us to decide the breadth of the term “labor dispute” as defined by the Norris-LaGuardia Act, 29 U.S.C. § 101 et seq. The union in this case threatened to picket a railroad unless the railroad agreed to subcontract work only to subcontractors who employ the union’s members. We must decide whether the union and the railroad were engaged in a labor dispute. The district court decided that this dispute was not a labor dispute and enjoined the union from picketing. We have jurisdiction under 28 U.S.C.. § 1292(a)(1), and we reverse.
I
Plaintiff-appellee Burlington Northern and Santa Fe Railway Company (“Burlington Northеrn”) is an interstate rail common carrier that operates an intermo-dal hub in Seattle, Washington. The present dispute arose when Burlington Northern terminated a subcontracting agreement with Eagle Systems, Inc. (“Eagle”) for loading and unloading services at the Seattle hub and transferred the work to another subcontractor, Parsec, Inc. (“Parsec”). As a consequence, 53 Eagle employees lost their jobs:
Defendant-appellant International Brotherhood of Teamsters Local 174 (“Local 174”) represents the Eagle employees who lost their jobs when Burlington ‘Northern trаnsferred the subcontracted work from Eagle to Parsec. Local 174 also represents employees of other subcontractors who continue to perform work under subcontracts with Burlington Northern. Local 174 does not represent any employees of either Burlington Northern or Parsec. A union that is not affiliated with the Teamsters represents the Parsec employees who perform the work formerly done by Eagle employees.
Local 174’s- first response to Burlington Northern’s termination of the Eagle contract was to request Burlington Northern’s aid in persuading Parseс to hire the former Eagle employees. Burlington Northern refused to arrange a meeting between Parsec and Local 174. Next, Local 174 sent a letter to Burlington Northern, explaining how the transfer of work to Parsec affected its members:
It has come to our attention that the Burlington Northern/Santa Fe Railroad*706 Company at times has chosen to subcontract ramp and deramp work located within the geographical jurisdiction of International Brotherhood of Teamsters, Local 174, to employers who have themselves as of the time of the subcontract nоt entered into a collective bargaining agreement with Local 174 or otherwise committed themselves to employ Local 174 members to perform work covered by the subcontract. This appears to be the case even though the work covered by these subcontracts has traditionally and consistently been performed by Local 174 members working pursuant to a collective bargaining agreement.
Any future use by BNSF of subcontractors who do not have collective bargaining relationships with Local 174 would deprive our members of work traditionally performed by members of Local 174’s bargaining units. For this reason, use of such subcontractors by BNSF in the future would impose substantial economic costs and personal hardship on the members of Local 174, including the loss of health, welfare, and pension benefits paid to the Western Conference of Teamsters Pension Fund.
Local 174 then requested that Burlington Northern agree not to subcontract any loading and unloading services to any subcontractor that did not have a current collective bargaining agreement with Local 174. Local 174 also threatened to picket in support of this demand. In the letter, Local 174 specifically limited its demand to future subcontracting agreements and disclaimed any intent to force Burlington Northern to terminate existing subcontracting agreements. Robert Hasegawa, Secretary-Treasurer of Local 174, testified that the union’s objective in demanding this agreement was to protect “family wage jobs and working conditions” in the area against deterioration.
Local 174 never commenced the threatened picketing because Burlington Northern brought this action against Local 174,
II
The Norris-LaGuardia Act deprives federal courts of jurisdiction to issue an injunction to restrain peaceful picketing in “any case involving or growing out of any labor dispute.” 29 U.S.C. § 104. Norris-LaGuardia defines the term “labor dispute” as
any controversy concerning terms or conditions of employment, or concerning the association or representation of per*707 sons in negotiating, fixing, maintaining, changing, or seeking to arrange terms or conditions of employment, regardless of whether or not the disputants stand in the proximate relation of employer and employee.
29 U.S.C. § 113(c). We hold that a dispute between a union and a client company (here, Burlington Northern) over whether the client company’s subcontractors must employ that union’s members is a Norris-LaGuardia labor dispute. Thus, the dispute between Local 174 and Burlington Northern falls squarely behind Norris-La-Guardia’s jurisdictional bar, and the district court had no power to enjoin Local 174 from picketing Burlington Northern.
A
We review de novo a district court’s exercise of subject matter jurisdiction. See Hexom v. Oregon Dep’t of Transp.,
B
Congress enacted the Norris-LaGuardia Act in 1932 to “tak[e] the federal courts out of the labor injunction business.” Jacksonville Bulk Terminals, Inc. v. International Longshoremen’s Ass’n,
The popularity of injunctive relief among employers stemmed from its unique effectiveness in stifling labor disputes. In contrast to civil damages or criminal prosecution, preliminary injunctions enabled employers to defeat unions instantly by preventing them from using self-help and destroying the momentum of strikes before substantive legal rights were litigated. “[WJhere the substantive law was uncertain, the availability of temporary injunctive relief became more important as a practical matter than the substantive law ultimately applied, since the momentum of a temporarily enjoined strike could not normally be regained even if the injunction ultimately was vacated.” Hardin, at 7; see also Allen Bradley Co. v. Local Union No. 3, International Bhd. of Elec. Workers,
Prior to the Norris-LaGuardia Act, the Suprеme Court’s construction of the federal antitrust laws ensured that federal courts had jurisdiction over labor disputes. In Loewe, the Court interpreted the Sherman Act’s prohibition on restraints of trade as applying to the activities of labor unions. See
The era of “government by injunction” ended with Congress’s enactment of the Norris-LaGuardia Act in 1932. “The underlying aim of the Norris-LaGuardia Act was to restore the broad purpose which Congress thought it had formulated in the Clayton Act but which was frustrated, so Congress believed, by unduly restrictive judicial construction.” United States v. Hutcheson,
In passing the Norris-LaGuardia Act, Congress described federal labor injunctions unequivocally as “ ‘abuses of judicial power.’ ” Milk Wagon Drivers’ Union,
C
We now turn tо the case law. The Supreme Court has consistently characterized Norris-LaGuardia’s definition of “labor dispute” as “broad.” See, e.g., Bhd. of Maintenance Way Employees,
It is clear that “the matrix” of Local 174’s dispute with Burlington Northern is “the employer-employee relationship.” Members of Local 174 lost their jobs because Burlington Northern transferred their work to a subcontractor who did not re-hire them and who signed a collective bargaining agreement with a different union.
Specific Supreme Court decisions regarding disputes about who will perform particular work compel us to conclude that Norris-LaGuardia applies. To begin, a dispute over an employer’s hiring decisions is a Norris-LaGuardia labor dispute. In New Negro Alliance v. Sanitary Grocery Co.,
Local 174 does not lose NorrisLaGuardia’s protection because Burlington Northern’s contracting policy, rather than
Moreover, the Supreme Court held in Milk Wagon Drivers’ Union that Norris-LaGuardia’s jurisdictional bar applies to a dispute between a union and an employer over the employer’s contracts with third parties. In that case, the union contended that the third party contracts took work away from its membеrs. See
In Milk Wagon Drivers’ Union, the union represented dairy employees who delivered milk to retailers. During the Depression, some dairies replaced their employees with “vendors” who operated as independent contractors.
*712 Whether rightly or wrongly, the defendant union believes that the “vendor” system was a scheme or device utilized for the purposе of escaping the payment of union wages and the assumption of working conditions commensurate with union standards.... [T]o say, further, that the conditioned abandonment of the vendor system, under the circumstance, was an issue unrelated to labor’s effort to improve working conditions, is to shut one’s eyes to the everyday elements of industrial strife.
Id. at 98-99,
Finally, two cases in which the Court decided that Norris-LaGuardia did not bar federal injunctive jurisdiction also persuade us that Local 174’s dispute with Burlington Northern is a labor dispute. In Columbia River Packers Ass’n, a union of independent fishermen agreed to sell fish only to canneries that agreed to purchase fish from union members. The union instituted a boycott against a non-compliant fish cannery. Describing the fishermen • as “independent entrepreneurs,” the Court held that the dispute was “over the sale of commodities” and thus, that the “employer-employee relationship has no bearing on this controversy.”
It is clear that Local 174’s dispute with Burlington Northern is not excluded from
Ill
Even if a dispute is a labor dispute under Norris-LaGuardia, a federal court may issue an injunction (1) under the Norris-LaGuardia Act’s “unlawful acts” exception, see 29 U.S.C. § 107; or (2) if the Railway Labor Act (“RLA”) provides the procedure for resolving the dispute. See Federal Express,
The RLA does not give the district court jurisdiction over this case because the RLA regulates only disputes between primary employers and employees. See Federal Express,
IV
We vacate the district court’s grant of preliminary injunctive relief and remand to the district court with instructions to dismiss for lack of jurisdiction.
VACATED AND REMANDED.
Notes
. Burlington Northern also named as defendants two officers of Local 174, Robert Hase-gawa and Eric Smith.
. In addition to filing suit in federal court, Burlington Northern filed an unfair labor practice charge with the National Labor Relations Board ("NLRB”), contending that Local 174’s threatened picketing constituted an unlawful secondary boycott under 29 U.S.C. § 158(b)(4)(A) and (B). The NLRB dismissed the charge, and its Office of Appeals affirmed the dismissal.
. The only issue before us is whether the district court had jurisdiction to enjoin the threatened picketing. We do not reach the question whether the antitrust laws are implicated.
. See U.S. Const, art. Ill, § 1.
. Section 6 of the Clayton Act reads:
The labor of a human being is not a commodity or article of commerce. Nothing contained in the antitrust laws shall be construed to forbid the existence and operation of labor, agricultural, or horticultural organizations, instituted for the purposes of mutual help, and not having capital stock or conducted for profit, or to forbid or restrain individual members of such organizations from lawfully carrying out the legitimate objectives thereof; nor shall such organizations, or the members thereof, be held or construed to be illegal combinations or conspiracies in restraint of trade under the antitrust laws.
15 U.S.C. § 17.
. Owing to this broad definition, the Supreme Court has found the term "labor dispute” to capture a wide range of controversies. See, e.g., Bhd. of Maintenance Way Employees,
. At oral argument, counsel for Local 174 stated that the union representing Parsec’s employеes is not affiliated with the AFL-CIO and that Local 174 has filed a charge with the National Labor Relations Board, contending
. It is widely recognized among scholars, practitioners, and policy-makers that client companies, such as Burlington Northern, are able to frustrate the efforts of employees to improve their wages and working conditions through collective bargaining by subcontracting work to third-party contractors. See, e.g., Commission on the Future of Worker-Management Relations, Report and Recommendations (December 1994) (established by the United States Departments of Labor and Commerсe) (stating that contingent workers, a category that includes employees of subcontractors, often receive lower pay and benefits than traditional workers and are less likely to benefit from labor and employment law protections); Craig Becker, Labor Law Outside the Employment Relation, 74 Tex. L. Rev. 1527, 1532-35 (1996) (stating that subcontracting "enables the client company to create a virtually continuous bidding process ... [that] exerts constant downward pressure on the wages of subcontractors’ employees” and to "thwart workers’ efforts to achieve labor representation, secure binding contraсts, and reap the benefits of informal commitments made by employers”); Jonathan P. Hiatt, Policy Issues Concerning the Contingent Workforce, 52 Wash. & Lee L. Rev. 739, 745 (1995) (describing how subcontracting agreements impede employees’ attempts to bargain collec-lively); Jonathan P. Hiatt and Lee W. Jackson, Policy Issues Concerning the Contingent Workforce, 12 Lab. Law. 165, 178-79 (1996) (discussing how the National Labor Relations Act might be reformed to enable employees of subcontractors to engage in effective collective bargaining); Jennifer Middleton, Contingent Worlters in a Changing Economy: Endure, Adapt, or Organize?, 22 N.Y.U. Rev. L. & Soc. Change 557, 595-96 (1996) (describing how client companies use the process of comрetitive bidding to control wage and benefit levels); Walter V. Siebert and N. Dawn Web-ber, Joint Employer, Single Employer, and Alter Ego, 3 Lab Law. 873 (Fall 1987) (advising companies how to structure subcontracting arrangements to avoid being deemed an employer under the NLRA); Eileen Silverstein and Peter Goselin, Intentionally Impermanent Employment and the Paradox of Productivity, 26 Stetson L. Rev. 1, 2 (1996) (asserting that contingent employees earn lower wages and benefits and have less job security than permanent employees); cf. Stephen F. Belfort, Labor Law and the Double-Breasted Employer: A Critique of the Single Employer and the Alter Ego Doctrine and a Proposed Reformulation, 1987 Wis. L. Rev. 67 (1987) (explaining how the practice of double-breasting enables employers to divert work to the nonunion sector and to pressure unionized workers to grant wage concessions).
. The question whether the secondary boycott violates federal labor law is not before us. See 29 U.S.C. § 160(j) (giving federal courts jurisdiction to grant injunctive relief to restrain unfair labor practices only in cases brought by the National Labor Relations Board).
. What distinguishes this case from Milk Wagon Drivers’ Union is that Local 174 has disavowed any interest in representing the Parsec employees, presumably because another union alrеady represents them. However, Norris-LaGuardia encompasses a dispute between a union and an employer in which the union does not represent or seek to represent the employees. See Marine Cooks,
.Although the Court in Milk Wagon Drivers’ Union did not decide whether the vendors were independent contractors, the facts suggest that they were. The vendors owned their own trucks, paid their own expenses, and earned a commission based on the amount of milk sold. See
. Burlington Northern attempts to distinguish Milk Wagon Drivers' Union on the ground that Local 174 has not develoрed a record showing that Parsec employees earn lower wages and benefits than are provided for under Local 174’s collective bargaining agreement. This distinction is irrelevant. Local 174’s dispute with Burlington Northern would still be a labor dispute even if Parsec paid equivalent or higher wages and benefits than Local 174 has achieved in its contract. Unions serve not only to obtain immediate improvements in wages and benefits, but also to provide job security to their members and to protect against wage and benefit deterioration in the future. Thus, Burlington Northern's position — that a union can have no legitimate interest, as a labor union, in challenging a client company's subcontracting decision unless that decision has caused an immediate decline in wages and benefits — is incorrect.
Similarly, Burlington Northern insists that what Local 174 really wants is an anticompet-itive lock on the jobs at Burlington Northern’s Seattle hub. It argues that the agreement that it demanded from Burlington Northern would be unlawful under Connell Construction Co. v. Plumbers & Steamfitters Local Union No. 100,
