Barack Obama explained, from Eric W. Dolan, Raw Story:

Climbing the economic ladder can influence basic psychological processes within an individual. According to a new study published in Personality and Social Psychology Bulletin this month, wealth tends to increase a person’s sense of entitlement, which in turn can lead to narcissistic behaviors. Paul Piff of the University of California at Berkeley told PsyPost “there is something about wealth that gives rise to a sense of entitlement, a sense that one deserves more good things in life than others, which in turn gives rise to an increased or inflated sense of self-importance, vanity, grandiosity, and omnipotence (narcissism).”

Change the word wealth to political power, and the argument makes even more sense. Nothing seems to imbue the intellectually weak and lazy with an over inflated sense of self-importance than political power.    For example, Obama thinks that Obamacare is just fine for the ruled class,  but not good enough for the ruling elite.