I don't actually think oil men have taken over the US government. We might all be at least somewhat better off if they had.
Oil is merely one of several businesses Bush junior dabbled in, with conspicuous lack of success.
Cheney has no deep roots in oil.
No-one says pharmaceutical executives have taken over, though that was Rumsfeld's job.
Amen to that.
If the Pres was T B Pickens & vice was Simmons - we would be well on the way to trying to fix this mess.