FYI, the Federal Equal Pay Act of 1963 provided that:
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 [...]The impact of the law was pretty significant. According to the Bureau of Labor Statistics, median earnings of women as a percentage of men's earnings rose from 62.3% in 1979 to 80.4% in 2004 (note Table 16 in the document).
Of course, there is still more work to do. Recently, Barack Obama signed into law the Lilly Ledbetter Fair Pay Act. Good stuff. I, for one, am glad that Batgirl is on the side of civil rights.
Except, you know, when it comes to catching criminals without probable cause or search warrants.