In my experience it's just plain old greed.
I have a lot of highly educated and very intelligent friends. The kind of people that can tell me a lot about things like art history, politics, science, physics and medicine. And almost all of them are conservative politically with a mindset that frames the world only for themselves.
They show empathy but only in the immediate circumstance. They will be kind open and caring and honest with someone in person at the moment. But get them to have a conversation about their feelings about wealth inequality and they cringe at the thought of giving up a penny for anyone.