You can see unspoken changes. In the 60s there were shows where it was "normal" for both parents not to have to work to survive.

In the 70s, "All in the Family" was a long running show. The bigotted head of the family, "Archie Bunker" had a wife who didn't work, owned his own house, and had a daughter and son-in-law living (played by current day resistance Dem Rob Reiner who being the son of Carl Reiner has never known want his entire life) with them while she went to college.

The kicker here is that Archie afforded all that as a non-college educated (IIRC) union forklift driver. I don't think that kind of life is even mentioned let alone the norm on TV today (I could be wrong, I don't watch TV but I read about it!).

I don't think it is a coincidence that Reaganomics and then Clinton's NAFTA PNTR with China, etc. coincided with an end to those kinds of characters on TV.