So, yeah, Americans aren't working 16 hour shifts in mines anymore and child labor laws are largely in effect. But, I also wouldn't say most people are treated "quite well." That's not the media force-feeding me stuff. That's first-hand experience and watching what friends and family are going through right now.
I think some people treat people well, but I've met too many small business owners who bristle at paying minimum wage.
Within any organization, you will have the sociopaths who want the glitz and title and power but have no respect for those they'll have to knock down to get there. That is what we're talking about.
https://www.ribbonfarm.com/2009/10/07/the-gervais-principle-...
This is a very important point and the strength of capitalism. Even a self asshole like Elon Musk is incentivized to provide useful goods and services and create jobs that raise people's standard of living.
I'm not sure what hierarchies you've been a part of where people actively trying to treat people poorly leads to their success - I'd wager those are few in far between in reality, and over represented in media. Maybe you're cynical about a few high profile companies or how U.S. politics appears, but positions of power exist everywhere in society, and society wouldn't be even remotely functional if people followed your assumed behavior.