I don't know about California, but I know that NYC MTA garbage collectors (job: taking garbage out of the subway) make about $50-60k and gets to retire after 20 years of work.
[1] Very few people, even highly unskilled workers, earn minimum wage. Market rate tends to be higher.
[edit: to clarify, by "taking garbage out of the subway", I mean taking the trash bags out of the garbage cans and bringing them to the dumpster, sweeping, picking up refuse, etc. In the private sector, this does not cost $50-60k. I'm not talking about track work.]