Earlier quoted context omitted.
Sure. The question is why they didn't do that until ~1970, which is when I think that era started. It sounds crazy today, but the vastly poorer US society of 1960 supplied pretty everyone with an indoor place to sleep and call home.
That isn't true. The housing projects of Lyndon Johnson's Great Society poverty reduction efforts didn't start until mid decade. Before that, you could infer that there was an actual need for it (even though it ultimately failed).
I think it was more a case of upgrading to modern sanitation standards etc.
That said, I have no real detailed knowledge, and would be happy to learn how wrong I am about this :)