I went to my dad when I was 17 and said 'I want to be a country music star.' Which every dad loves to hear. And he said 'I want you to go to college.' So we had a discussion. And I'm pretty stubborn. I'm a lot like him. And he said 'If you go to college and graduate I'll pay your first six months of rent in Nashville.' So he bribed me.
Many people around the President have sizeable egos before entering government some with good reason. Their new positions will do little to moderate their egos.