'The pay disparity mainly exists because women tend to dominate the jobs that pay less.
Also women are much, much less likely to take up dangerous jobs that risk life and limb, so the sheer danger involved make these jobs pay more, and since men take these more, you shouldn't be surprised that men earn more.
Women earn on an average 23% less than the average man's salary. But that's the problem with averages, they hide the real disparitites and the causes. When you do some introspection, you find there isn't much for women to complain about regarding this. '
These are excerpts of an excellent answer taken from answersgeek (hope you don't mind if I make further use of it).
Tags: