Au Contraire, from the Romney campaign: 

By the way: The story that women make 75% of the pay that men do for the same job? Turns out it's bogus. From the Independent Women's Forum:

Americans appropriately recoil from the idea of a sexist economy that short-changes hard-working women. If it were true, it would be outrageous.

Fortunately, however, this commonly repeated claim is false. There is no evidence that women are routinely paid a fraction of what men make for the same work, or that discrimination drives statistical differences between men and women’s earnings.

The Department of Labor statistic underlying the “wage gap” claim simply compares a full-time working man’s median wages with those of a full-time working woman, ignoring the many factors that affect earnings, including number of hours worked, industry, years of experience, and education, to name but a few. When such information is taken into account, the wage gap shrinks, and in some cases even reverses.