Explain to me why the 30% difference between men and women wages is bull hockey and provide numbers and actual facts please. No, this isn't a homework assignment, If I wish to hold this controversial view I need some more supporting data and what better place to ask than here?

Edit: thanks so much guys you by far are the best subreddit I have seen on good info and quick not flaming replies. The only complaint is that somehow this post is downvoted........Why?