Yes, it IS good for them. And bad for you. You're talking about one of the most powerful entities in the world - Exxon Mobil is larger than most countries - with no accountability to anyone. The government that you hate so much is being steadily dismantled BECAUSE private tyrannies (i.e. corporations) are using their vast coffers to break and twist it into the form they desire. Why, exactly, do you think the government gives money to banks or the MIC?
The more power corporations have, the more they can resist the controlling influence of democracy, the worse off we are. Observe Exxon's use of their power to confuse the debate on global warming for years, assuring that nothing gets done to compromise their profits and that the planet continues to choke on the waste gases their products emit.
As someone who's been an anarchist most of my adult life, I find it bizarre when so-called libertarians cheer the destruction of democratic government and the increasing devolution of power into the hands of the people who have, for the better part of this past century, been largely in control of our society. If you're REALLY in the favor of liberty, why are you such a fan of enabling so much power going into such few hands?