You cut off opportunities outside the home, you make the public sphere hostile to women’s independence and you create a system where the only viable path left for a woman is dependence on a man for survival.

Ethics aside (yes, I know that's a huge asterisk):

• We've set up society to be dependent on dual-income households. Given that the most commonly cited reason people aren't reproducing (starting later, stopping sooner, w/e) is economics, limiting women's ability to contribute financially to a household is only going to exacerbate this.

• As a childfree man, I don't want a woman to be dependent on me. If my partner is stuck at home due to being unable to work, that isn't going to make me suddenly decide that I want to become a parent. If I was on the fence (which I'm not), it would definitely push me onto the "no" side of the fence due to financial considerations.

This is just fucking stupid and won't work the way they think it will.