This appeal presents a single question: whether § 510 of the Employee Retirement Income Security Act (ERISA), 88 Stat. 895, 29 U.S.C. § 1140, applies to unvested benefits. Section 510 provides:
It shall be unlawful for any person to discharge, fine, suspend, expel, discipline, or discriminate against a participant or beneficiary for exercising any right to which he is entitled under the provisions of an employee benefit plan, this title, section 3001, or the Welfare and Pension Plans *257 Disclosure Act, or for the purpose of interfering with the attainment of any right to which such participant may become entitled under the plan, this title, or the Welfare and Pension Plans Disclosure Act....
Massey Ferguson Parts Company fired Allan T. Heath shortly before he was to become eligible for early retirement. (Varity Corporation has succeeded to Massey Ferguson’s obligations, and AGCO Corporation to its operations; we use the original name.) The discharge did not affect Heath’s pension, long vested under the terms of the employer’s plan and ERISA itself. But it did prevent him from becoming eligible for additional benefits. Heath believes that Massey Ferguson acted “for the purpose of interfering with the attainment of any right to which such participant may become entitled under the plan” — that is, the early retirement package. Heath also believes that his employer discriminated on account of age, in violation of the Age Discrimination in Employment Act. The district court granted summary judgment against Heath under ERISA but reserved the ADEA claim for trial.
Under the district court’s approach, § 510 protects only persons who lay claim to (or seek to qualify for) vested benefits, which ERISA prevents an employer from abolishing. This is a possibility that we have considered, and rejected, before.
Kross v. Western Electric Co.,
The district court was aware of these cases but declined to follow them, explaining:
This Court believes ... that the contradiction between the treatment of plan amendments and employee discharges under § 510, a contradiction which apparently was not argued or discussed before the 7th Circuit during its consideration of the issue, is the key to recognizing the error in extending § 510’s protection to the unac-crued benefits of vested employees. Had this contradiction and corresponding analysis been brought to the 7th Circuit’s attention, Kross may have been decided differently.
*258 Section 510 does not distinguish between vested and unvested benefits. It forbids adverse action “for the purpose of interfering with the attainment of any right to which such participant may become entitled under the plan”. “Plan” includes both pension and welfare plans; the former category includes some vested benefits, the latter does not. The district court conceded that the statute’s most natural reading is the one Kross gave it, but it then conducted an extended tour of ERISA’s legislative history. Such a journey is inappropriate. Unless an ambiguous term needs construction, a court should stop with the statutory language.
Interpretation is a contextual enterprise, and the principal context of § 510 is the remainder of ERISA. The district court thought that the statute as a whole contains a contradiction: why must an employer that is free to modify or abolish a plan ensure that each employee receives its full benefits? To resolve this supposed contradiction the district court limited § 510 to the sort of benefits that an employer cannot affect by changing or abrogating the plan. Yet a court should endeavor to apply all parts of a statute whenever possible. Tensions among statutory provisions are common. Legislation reflects compromise among competing interests. That employers won a battle and secured the right to modify plans, while employees prevailed in a different skirmish and secured the right to qualify for benefits under existing plans, shows no more than that each side could claim some victories. It upsets the legislative balance to push the outcome farther in either direction. Just as a court should not use § 510 and ERISA’s other fiduciary obligations to curtail the employer’s right to modify a plan, see
Johnson v. Georgia-Pacific Corp.,
ERISA draws a line between an employer’s right to modify or abolish a plan — which it may do without acting as a fiduciary for the workers — and the employer’s duty to provide employees the benefits of existing plans.
Jos. Schlitz Brewing Co. v. Milwaukee Brewery Workers’ Pension Plan,
No matter which end of the telescope one looks through, the picture is the same. Suppose the supervisor who fired Heath had purported to amend the plan to strip him of access to the early retirement package. Consider two possibilities: (i) the amend
*259
ment reads “The early retirement program is hereby abolished.” or (ii) the amendment retains the program but adds “Notwithstanding the criteria ordinarily used to award early retirement benefits, Allan T. Heath is ineligible.” The first possibility is open until the date Heath retires, but only if Massey Ferguson uses the amendment procedure laid out in the plan or proper under general corporate law. See
Curtiss-Wright Corp. v. Schoonejongen,
— U.S. -,
Whether Heath’s discharge was related to his impending thirtieth anniversary with the firm, or to his age, are questions we have not broached. They remain for decision in the district court. The judgment is reversed, and the case is remanded for further proceedings consistent with this opinion.
