Also, in the USA, it’s possible (not to say easy) to go from the poorest to the richest in a single lifetime, and to do it by serving the needs of others. Gates, Musk and Bezos may not have grown up counting pennies to buy a gallon of milk, but they didn’t start out as super wealthy. They had a good idea and turned that into product that made peoples lives better and because immensely wealthy as a result. Say what you might about their honesty, ethics, and such but they still primarily served others on their way to wealth. Outside of western capitalism that kind of thing just doesn’t happen. The mega rich in those other systems got there by abusing and enslaving vast numbers of humans. Not by selling them a product or a service.