There are other direct and indirect ways useful politicians, their friends and families can benefit from corporations that they help. Some of these ways have been made illegal, but corporations and their beneficiaries in politics are very good at finding loopholes in the laws they write.
Another way corporations wind up being exempt from regulation is through defunding of regulatory agencies, or by pro-corporate-welfare ideologues being placed in charge of these agencies -- after which they fire the career officials at these agencies and replace them with loyal lackeys who will unquestioningly pursue the agenda of deregulation, defunding the government, and looking the other way at corporate malfeasance. Then, after breaking the government, they can blame the government for not working.
But the underlying problem is that government and corporations are not really two separate, independent entities. They are quite tightly integrated and interwoven, with one hand washing the other, scratching each other's backs, and giving each other kickbacks and bribes.
It's a real wonder any major antitrust actions have ever happend, that there are any worker protection laws or unions left, that the Envirionmental Protection Agency has any teeth, and that the National Parks haven't yet been sold to logging, mining, oil, and natural gas companies.
That's a great idea, really. Sadly it's unlikely that the feds will bust monopolies when those same monopolies are so damn convenient for them for spying.
We've got a problem here. The government, which is supposed to be trustworthy, isn't. And that means that some of the other checks and balances that the government is supposed to provide will be defeated internally. And we're stuck with the consequences. Rad.