The Equal Pay Act amended the Fair Labor Standards Act (1938) with the intent to end the disparity in wages between men and women. The amendment argued that sex discrimination depressed wages and living standards for employees, hindered full employment, caused labor disputes that in turn affected commerce, and violated free and fair competition. The crucial part of the amendment: “No employer having employees subject to any provisions of this section shall discriminate, within any establishment in which such employees are employed, between employees on the basis of sex by paying wages to employees in such establishment at a rate less than the rate at which he pays wages to employees of the opposite sex in such establishment for equal work on jobs[,] the performance of which requires equal skill, effort, and responsibility, and which are performed under similar working conditions, except where such payment is made pursuant to (i) a seniority system; (ii) a merit system; (iii) a system which measures earnings by quantity or quality of production; or (iv) a differential based on any other factor other than sex…”