It may seem like the corporations control the politicians. And to a great degree they do through campaign donations, etc. But in the end? No, Corporations are at great risk from the politicians and bureaucrats. Just look at Big Coal, Big Oil, all it takes is for the politicians to become indebted to another entity who opposes their former benefactors.
Then the Corporations will be eaten to death small bite by small bite until there is a hollow shell left.
That is why the politicians and bureaucrats are afraid of small business and small farmers. They hire more people and in the end influence far more voters than the big Corporations do.
I would go so far as to say that Big Corporations actually alienate more voters than they influence. After all the Big Corporations are concerned about the short-term bottom line and small businesses are concerned about the long-term future as their business represents the future of their families.