I often see it phrased this way, but I always wonder how much of the effect is actually "A rise in two-income households has led to inflation and stagnant wages"?
Certainly, there's a positive feedback mechanism at play, but it always seems to be presented as "A causes B" rather than "A and B reinforce each other".
No doubt your point of mismanagement and bad actors is valid but it’s important to recognize that much of the glory days of the American middle class corresponded to the height of many others misfortune.
In our local newspaper there have been many articles about wage stagnation and the decline of our manufacturing base as well - albeit we may be a few years behind America which isn't much in the grand scheme of things.
It's not women's fault collectively though. The funny thing is mass influx of labor like this are the very things unions have fought against. But unlike non-americans, unions couldn't be anti-women because they'd look bad, and they couldn't be anti-women in the workforce because it'd also be anti American since they're citizens.