Each participant shall contribute monthly to the program the same amount he would be required to contribute to the South Carolina Retirement System if the participant were a member of that system. Participant contributions may be made by payroll deduction, by a reduction in salary, or by employer pick up in accordance with any applicable provisions of the Internal Revenue Code of 1986. Each employer shall contribute on behalf of each participant the same amount it would be required to contribute to the South Carolina Retirement System if the participant were a member of that system. Each employer shall remit to the designated companies, for application to participants' contracts or accounts, or both, an amount equal to the participant's contribution plus that percentage of each employer's contribution which would have been used to fund all retirement system benefits for future service if the participants had been members of the retirement system, but the employer's contribution may not be less than four and one-quarter percent of compensation. The employer shall remit the remainder of its required contribution to the retirement system, but the contribution to the retirement system must not be less than two and fifty-five hundredths percent of the employee's compensation.