The idea that it was common because that's what was depicted on TV ain't really so. Think about how many shows right now, and over the last 30 years, have had people living in NYC, in huge, modern apartments, while working as a cab driver. Or a waitress.
The truth is that our standard of living has increased; real purchasing power has gone up. But we also expect to do more, and have more. And the cost of essentials has increased faster than the cost of non-essentials, which makes the gains feel like they're being chewed up and spat out.
https://www.consumeraffairs.com/finance/comparing-the-costs-of-generations.html