Well you know what? Building massive empires while evading taxes, exploiting unregulated markets or down-right not adhering to existing law and then relying on „philanthropy“ to make the world a better place should be disincentivized.
That said Bill & Melinda Gates do seem genuine in their efforts and I think it‘s great what they‘re doing. They just shouldn‘t have been able to obtain such obscene amounts of wealth in the first place.