This thread feels like it went off the rails given that every locale I've ever lived in (many across the US) had fine, working garbage collection, and plenty of competent garbage men who worked for what I'm guessing was decent pay, certainly less than $10 million a year.
I think in reality, it shouldn't be hard to find people willing to take out garbage by simply paying a little better than other manual-labor jobs. There's always going to be people who can't work other jobs for some reason, so if they're choosing between manual labor jobs, the one that pays more is going to be more attractive. They don't need to pay enough to hire a doctor, because not that many people can do high-value work like that competently.
The thread started out off the rails. Contrary to the claims of youre-wrong3, garbage collection is not a particularly high paying job and has no real trouble getting new hires.