Alternative title: Majority of Americans are not rich, and therefore see no downside to taking from those who are I do think the inequality gap is becoming more of a problem, but simply asking the population if they want someone else to pay more is going to have the obvious result.
I do agree that the sentiment is pretty deeply ingrained in American culture though, for a long time people have voted and advocated against their own interests because one day they might win the lottery and somehow make it through the insane taxes that come with that to qualify for a tax liability on their estate when they end up passing.