That does kind of sound like a punishment of the future: you have to do 'manual labour' - which people are so unwilling to do, that it also happens to be the highest paid.
White collar workers make TikToks for lattes, Blue Collar workers are the high income earners.
It's already kind of happening.
Alberta Oil workers are 1% 'petrochemical' Engineers. They are 'everything else'. Cooks, drivers, daycare workers, maintenance, carpenters, electricians, managers, team leads etc. etc. and earn about $120-200K, and while at the camp everything is provided for them in quantity (food is amazing if you like 'Denny's' kind of food).
I can say, anecdotally, when I lived in Silicon Valley the blue-collar guy down the street had his own house painting business and did alright as near as I could tell. I know he got in a few hours of golf during most days.
Also on the golf course, realtors in the area.
Another is if you take millionaire to mean “feel well off or rich” then being in a lower wealth industry will help that vs having everyone around you also be wealthy.