I'm, not a shrink and I don't play one on TV, but I think several factors are involved: 1) they're addicted to the perks of office and power to boss people about with the club of government retribution always at hand; 2) these people are extremely arrogant; 3) they see themselves as an elite group that should rule over the dumb masses pf peasants.
I think those are the primary ones, but there are others. Incompetent, evil people are flawed human beings that have a real dislike for the average citizen. These people deserve to be put down like the rabid vermin they are.
good answer