> Single income households were a common occurrence, since dual income households competing for housing were not out competing single income houses. And I don't mean this in a crypto conservative way, even Elizabeth Warren wrote a book about it: https://en.wikipedia.org/wiki/The_Two-Income_Trap

I haven't read the book, but her speech a decade ago is really eye opening.

https://www.youtube.com/watch?v=akVL7QY0S8A