That's just the system. This is what happens when people confuse commerce with capitalism: They think that capitalism is being rewarded for doing commerce better. Instead, capitalism is about leveraging ownership of property and underpaying workers in order to get money for free.

And the thing about money is that it's really just a proxy for power. When you only have enough of it to eek out a comfortable life (or less), you don't really notice, because all of your power goes in to achieving or maintaining that acceptably good life (or hanging on for dear life trying to survive), but once your needs are comfortably and handidly met, money is entirely about being able to make other people do whatever you want. And the more money you have, the more things you can get them to do, or the more of them that you can get to do what you want.

And if you've managed to be one of the lucky ones who just get free money for owning shit, then you have the power at your fingertips to try to grow your power over others exponentially, while still doing no honest work in your days. And if you're a shitty person who gets off on all of this, that's exactly what you'll do.

The wealthy are insufferably greedy leeching assholes because one does not become wealthy without being greedy, leeching off of others, and being an insufferable asshole.