[donquixote99]

People with too much unchecked power always use it corruptly. This means they act selfishly, and pay no heed if their actions are destructive to others. This applies to capitalists, who wield tremendous and generally decisive power in our society. Capitalists control government through their power to invest or to not invest, to open or close workplaces, to expand economic activity or contract it. They in general get the laws they want and veto the ones they don't. It takes exceptional public pressure or necessity to overcome the structural power of capitalists. You weren't taught this in civics class, were you?

The problem is that other institutions with too much unchecked power likewise tend to behave badly. The police are a current example but government in general can go this route. The historic problem has been that a government with enough power to break the grip of the capitalists has become totalitarian and oppressive itself. The need is to balance the powers so each can check the other, so none becomes corrupt.