First off, it is totally unfair and it is wrong. There is absolutley no reason whatsoever that a man should get more pay than a woman if they have similiar jobs. Basically, though women have taken many giant steps over the last number of years and have broken down many barriers, it is still "a man's world".
As a man who's mom is his hero, I would love nothing more than women gaining greater oppurtunity in the workplace, especially when it comes to pay. Hopefully this process will speed up and take on greater momentum.