Class is fundamentally different from race, culture, or some bullshit star signs, because it gives you outsized power and influence over the world around you. Combine that with the fact that people will generally act in ways that help them and the people important to them, and you can see how wealth can both corrupt people and warp the society they live in.
It’s not hard to see how rich people are generally worse people: every time they pay someone less even when they could reasonably afford more, or raise rent beyond a modest profit, they are actively contributing to the problem.