Probably the hardest working people that I've seen are recent immigrants, doing literally the shittiest work in the shittiest conditions for people who probably had a lot of advantages set up for them and never worked remotely as much or with as much abuse, and who are genuine monsters.

The prime minister of Canada is not rich and powerful because he worked hard enough as a teacher. He became a teacher because his former prime minister dad set him up very well, with nothing else to do but fuck around doing dumb peasant things. Ya, he worked hard, but never had to worry about anything from day 1. His former prime minister dad only did the exact same thing after his dad made a ton of money in oil and gas.

Elon Musk's dad was a literal explorer who made his money in... mining.