I believe kerry travels to such excess to escape the demons that chase him. At some level he knows he is a worthless, nincompoop, degenerate loser at life.
With the typical lib ego he has, he is convinced that everything he does is on the side of good and we are all just conspiring against him. He will never realize “he is a worthless, nincompoop, degenerate loser at life”. In his feeble long faced little mind he knows that he must be right otherwise how would he be so rich. (Uh, teresa?)