“Human nature” is where material conditions intersects with cultural conditioning. “Left leaning” doesn’t mean anything in America, especially when the cultural underpinning of the society is consumerism and the acquisition of wealth.

Ownership class needs to extract as much value as they can out of their workers. They think that if you don’t entangle healthcare with employment, then no one’s going to work anymore. I think it is all projection; the wealthy already don’t work nearly as hard as the people they exploit.