A lot of billionaires in the past couple centuries have fallen into the "utopian socialist" bracket. The type that fetishises the idea of a noble leader presiding over a prosperous kingdom. They see socialism as a return to some idyllic feudal society where they serve as benevolent benefactor of the starving workers who worship them for their generosity.

Sometimes they break out of that and become actually radical (see most of the first waves of communist leaders and thinkers), but a lot of the times their vision of socialism is so far removed from materialism that it's actually just psychotic feudalism.