So, it has been established that the Gender Pay Gap is not a result of some evil male-conspiracy to pay women less for the same amount of work, but mostly the result of lifestyle choices: women -in general- realizing they want families once they reach a certain age, and want to spend more time with their families, rather than spending 70+ hours at work.
Regardless, many activists, journalists, and people with bullhorns want to redress this situation in a way to "elevate" these women in the expense of those evil men who make more money.
There is one problem with this viewpoint: it looks at individuals rather than family units. Because if one partner has a lowered income due to childcare duties, you know what happens? The other will try to make up for this shortfall. He will put in more work. He will fight harder to progress his career and increase his earning potential. He will spend more time at work (which ironically means he will have less time to chip in around the house.) So if you somehow make it more difficult for men to earn money (or favor women in general with diversity quotas and other methods in hiring), you will make life really, really difficult for those women who are at home tending the children.
Now I understand that for a feminist this is no way for a woman to live (we only respect choices if they are the right choice), however, it is still the result. You make families (and hence women) worse off. Which is a textbook case of unintended consequences of poorly though-out policies. Trust me, these things end horribly almost always; I came from an ex-communist country - I should know.