I think this is common, or at least not uncommon; I'm in the same situation though it's more of a "strongly prefer not to work for". If I didn't have any other options that could provide a bare minimum salary that I can live off of, I would certainly apply at the "evil(tm)" companies. It's an unfortunate symptom of capitalism that evil tends to get ahead.

I also think this is part of the reason salaries at these companies are so high (exceptions aside, they're generally higher than at less evil companies). If they didn't distinguish themselves on salary, people would always go with the underdogs which may not be as corrupt yet.