I "know people" who hire them, typically $150-200 / day before pandemic. Some do work honestly some are just useless. From what I heard the middle aged one are the good workers, not the younger ones.Sorry, this is a strawman argument filled with assumptions that I will not address.
It is my belief though that nobody has the right to live comfortably in California if they do not have the assets, or the skill set necessary to earn enough to survive in that desirable but high cost state. If you can't afford to live there, move to where there is a lower cost of living.
The guys in the Home Depot parking lot do fit Dishdude's description above. Paid under the table, no taxes paid, probable documentation issues. And, from what I've heard from homeowners that hired them, crooked as a dog's leg. The few left have probably burned a lot of bridges if they can't get hired with this labor market.
I usually hire the pros (legal reputable businesses) who hire these people themselves (I can't tell them how to run their business), typically they charge $200-400/day labor worth of work, I'm sure they make a cut and they are responsible for screw up, so they know the regulars.
I'm not sure how much ends up in the pocket of these guys, but you are not paying HD parking lot crowd minimum wages either, they have more self worth than McD teens.