When companies are big or rich enough they can capture regulators and pay for lobbyists to override the masses, the democratic process is undermined.
We become ruled by socialopathic oligarchy, in the form of corporations instead of a few individuals. And no one executive can be held accountable because they're large organizations that diffuse responsibility.
Once I was a young conservative who thought these ideas were crazy Hollywood tropes. As I get older I see the pattern manifest more and more in the USA.