Huh? Little evidence? Prosperity in America was built by millionaires that drove 20 year old white pickup trucks (because base color was $100 cheaper). They were very "common wisdom". Almost all had to understand and operate within the commodities markets(where reason and empiricism meet head first with humanism and human behavior), head multi million dollar organizations, negotiate multi million dollar deals, and tried to build multi-generational (not next quarter) businesses.
And every one I knew made sure their children went to University and were educated, because they understood it's value. So did every farmer, factory worker, bus driver. Their kids didn't understand the value, they just new they had to go. Just like todays kids don't understand the value. I don't think that's changed, other than parents aren't forcing life choices on their kids.
You are either very young and only exposed to the modern Audi driving millionaires, or had zero interaction with the actual industrial/ag/creative space/inventor America pre 2008/pre MAGA brainworms. But these people used to exist and were building blocks of this country AND local communities (unlike their zero community loyalty replacement leased Audi millionaires).