So I'm really the guy who has to explain this to you? Okay. Money's not really the issue. Power is. Money is power. The power to pay people to do things for you, if you have a lot of money you pay the government to do things for you, or the power to buy up resources and charge other people even more to buy them back, among other things. Or when you're the only person who offers a desperately needed product or service, and you charge people an awful amount of money to have it? That's called a monopoly, and in that case you have all the power.
People want power to avoid feeling powerless to other people. If someone makes you feel powerless you hate it, right? Well, most people figure out that the guy with less is mostly powerless against the guy with more. So it's a constant struggle to get to the top until you die. Unless you're from some kind of ridiculous utopian playland, then it might be different there.