Nincompoops want people to obey them -- it's their only path to consequentiality. Hence, politics.
Well-off people with no problems won't tolerate nincompoops, but will tell them to bugger off. Hence, the well-to-do must be made less well-to-do, and the struggling must struggle in vain. No not-needing-nincompoops allowed!
Remember South Park's takedown of Al Gore in the "Manbearpig" episode? That pretty much gets it.