you have to be a greedy capitalist

What's capitalism supposed to be? Yeah, it's crony capitalism. That's capitalism, you do things for your friends, your associates, they do things for you, you try to influence the political system, obviously. You can read about this in Adam Smith. If people read Adam Smith instead of just worshipping him, they could learn a lot about how economies work. So, for example, he's concerned mostly with England, and he pointed out that in England, and I'm virtually quoting, he said the merchants and manufacturers are the principal architects of government policy and they make sure their own interests are well cared for, however grievous the effects on others, including the people of England.

Yes, it's their business. What else should they do? It's like when people talk about greedy capitalists, that's redundant. You have to be a greedy capitalist or you're out of business. In fact, it's a legal requirement that you be a greedy capitalist and that you don't pay attention to what happens to anyone else.