I don't believe that the FA is corrupt (at least in the sense that they deliberately favor united over other teams), but it is almost undeniable that united seem to have better "luck" with the officiating, and that, imo, is because Ferguson was the best manipulator of the refs for many reasons like his experience, his name in football..etc Whenever he talked about refereeing before a game, you guys would get 50-50 calls given your way. Whether that is "fair" or not or should have been allowed or not is an entirely different matter. But it certainly happened and it certainly worked more often than not.