If some women get paid less because they work less hours for
whatever reason, that is their choice. If they are paid by the hour, and they want more money -- work the longer hours, and you get paid more.
I was a LEO for 30+ years. Our female officers got paid the same as we men. The problem for us was that if they dispatched a man to a call, he was sent alone most of the time. If they dispatched a female, they would send two guys as backup. Silly, and not very cost effective -- three people to a one people call??
As usual, Mr. Obama has interpreted the statistics to suit his needs. Lies, darned lies, and statistics -- in ascending order of evil.