Earlier quoted context omitted.
Is it actually true that the savings on home maintenance and social services offsets the higher salaries of white collar work? That's kind of crazy if it's true. In the US, you can make pretty good money in the trades, but generally, there are many caveats - you have to be your own boss, preferably with a few employees; you pay your own benefits; you don't get any paid leave; and depending on the trade, you could be…
Yes. It’s relatively straightforward to work on a fixer upper house during which time you are drawing no salary relative to that, and then you can turn around and sell it (or just enjoy being in a nice house which otherwise would have cost hundreds of thousands).
I'm not debating that tradespeople can make good money - that absolutely can. But, that's the exception not the norm...
The average plumber or electrician in the US earns about $65k/year... that's about 2/3 (or less) of an entry level programming job. Even if that isn't capturing side work/income, that's still less than a mid-career developer (earning $150-$200, more if they're on the west coast on NYC).
Put another way, even at retail consumer prices, I can buy a lot of plumbing or electrical service and still be money ahead on my fairly average engineering manager salary.