<p>Women make less money than men, on average, because they’re more likely to do things like take a couple years off, work part-time, decline additional responsibilities, etc. in order to have more time to spend with family (especially if there are young kids in the picture). This causes the skewing in the data you’re looking at.</p>
<p>A woman doing the same job in the same circumstances as a man will get paid the same - it would be illegal otherwise.</p>