Earlier quoted context omitted.
Tradespeople do fine in areas where the economy is good. They are still highly paid and unionized. My friend welds staircases in the Bay Area and gets paid more than most programmers. Is there really a case where an electrician or pipe fitter today makes a lower wage than they did in 1970? If anyone's salaries in the USA have remained stagnant or dropped, it's the average engineer.
Engineers do fine. It's the line workers in factories and people in service jobs that have gotten screwed. It used to be that you could make a steady middle-class income as a factory worker, airline stewardess, or retail clerk. Not so much now. Tradespeople and professionals have done okay because they have marketable skills that accrue to their person, but people whose only assets are owned by their employers haven'…
If you truly believe this, can you tell me what good or service the factory worker/retail clerk had back then, but lacks today?