This makes sense, and as far as explanations go it's better than most running around on the internet.
Yet, it was a very abrupt change. Did the US population have that abrupt change to reflect there? On society it's common that a very steep change leads to spread-down consequences; the reverse almost never happens.
Right, we have double the work force now thanks to women's rights. I'm not saying we shouldn't have women's rights. Every human should have the same rights. I'm just saying that definitely played a factor in wages.