I know corporations are evil little demons when it comes to actually playing on a level playing field in regards to taxes though.
Enforcement is one thing. The playing field is quite another. If you don't like the playing field, change the law. If you feel you can't change the law because those making the law are corrupt, say so with evidence in hand; there's plenty to be found. If you do that and fail to get enough of your fellow citizens to care, realize that your primary problem is precisely that: your fellow citizens, by and large, do not care. Good luck with changing that.