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Or apply increasing "drag" as wealth accumulates, i.e, wealth taxes, maybe starting at a few bps once you have $100m.

Throw in some social accolades / parades / public acclaim for people who pay the most taxes.

I have been considering the latter (accolades and/or naming things after tax-payers) as something that is severely under-utilised in most places.

Charity yields higher appraisal, while reducing taxes. Though this has the benefit of letting better decide what is done with the money.

Historically speaking the things the rich think are worth spending money on haven’t lined up with what society thinks is best all that often.