Wealth doesn't buy power directly. In a democracy most power comes from voters, so the only way to buy political power via wealth is to affect the voting proces

Wealth doesn't buy power directly. In a democracy most power comes from voters, so the only way to buy political power via wealth is to affect the voting process by spreading misinformation or manipulating the people. For example in USA the voters are made to believe that they can only vote for people who has spent their lived taking bribes from corporations. That of course isn't true, but as long as people believe it then it money is power. In nations where people don't believe such blatant lies money doesn't turn into power nearly as easily. And look, poor people in those countries are actually much better cared for and live better lives than in USA! The bottom 90% are 90% of voters and therefore have all the power to make whatever policies they want. And once the 90% makes a lot of policies it is really hard to stop them from continuing doing that, you have to work really really hard to keep them away from power and to continue keeping them away.