Many other cultures have a gift economy, where the powerful voluntarily redistribute their wealth in exchange for status. Culture is very powerful, often overpowering pure economics. Warren Buffet and Bill Gates have already pledged huge fractions of their wealth towards the common good. On the other hand, the historical record on politically forcing the wealthy to hand over their wealth also supports the notion of voluntarism. It's the society and culture which are the overarching influences. If we changed the culture such that trusts supporting intentional communities were the way the wealthy could have a meaningful impact and legacy, then we could conceivably house over half of the US in virtually free housing.
Arguably, living, thriving creative communities would be far more meaningful than plaques in a museum, park benches, and buildings on a college campus. (Colleges are over-funded and in a bubble as it is.)