No, people who were already selfish get more conservative the wealthier they get.

Also, people who started out narcissistic, greedy and/or status-seeking pursue wealth more diligently than those who are decent, well-adjusted human beings. So there’s some self-selection going on. Another way of putting that is that capitalism disporportionately rewards sociopathy. Dark Triad personality traits confer a selective advantage in a capitalist system.