I hate that wage disparity is being heralded as a gender issue. It's really a negotiating problem. My coworker and I were hired together, same position, same experience, and offered the same salary. When I was offered the position, I asked for $15,000 more and they gave it to me. My coworker didn't ask for more and is therefore now making $15,000 less than me. After six months, I asked for a raise of $5,000. He never…
Yes! It's not that somebody said, "hey, we can pay this person less simply because they are a woman." It's that the employee themselves may have negotiated for more. Correlation is NOT causation.
I think, given what I've seen so far, women are given less leverage to start with, they are subject to the chilling effects of gender biases, and they are discouraged from negotiating more often than not.
Sure, a woman can overcome these obstacles, but she shouldn't have these extra obstacles in the first place. The "pay gap" is almost certainly not due to managers thinking "oo I'll pay her less because she's a woman," but it is still indicative of some (more complex) gender inequality.