The more interesting thing is the distribution of income. I would happily bet that there still is a considerable gap between women on average and men on average and that the total amount taken home by that majority is significantly less than the total amount for the men.
Women tend to choose jobs that pay less. They're on average more interested in people, so they tend to choose to become nurses, teachers, etc., while men are interested in things and become software developers, engineers, etc. I have no idea why income HAS TO be distributed equally. Unless you want to force women to become software developers..? But why.
Also, nurses are some of the least empathetic people around. Don't be fooled by the common misconception; they're usually not caring people at all. "Nurse Ratchet" is not that far from the truth. My mom was a nurse, and I've met many others; they're just not the nicest people around. And there's a good reason for this: a highly empathetic person would not last very long as a nurse. They'd get burned out very quickly, after seeing so many sick and dying people up close day after day.