you give any person to much power sooner or later it goes to their head.
Nothing could be farther from the truth.
Oh really? Can I point you in the direction of Congress for further examples? Perhaps 1600 PA Ave? I could go on...
Yes, really. The way it was phrased is that if a person has power than it shall go to their head. That means in essence 100% of the time. Again, nothing could be further than the truth. Some of your examples might very well be true (again you inferred 100% of Congress), but it's not 100%. That was the only point I was trying to make.