This is the only upside of wealth inequality, that sometimes a part of the immense wealth accumulated at the top is used for patronage of the arts, of science, or for building something lasting.
So, actually, philantropists like the Gatess foundation could pour money into vaccine research, or into orphan diseases, as we know Big Pharma is only interested in treatment, not prevention.
The sad part is that, in more "socialist" times, a worldwide push to eradicate smallpox was successful, and the likelyhood of anything like that being initiated in our neoliberal international climate is next to zero. Those whom the Gods wish to destroy They first make mad. -- Euripides
But if not for the wealthy, who would buy expensive new high-tech junk that doesn't work well -- thereby creating a market that drives design improvement and cost reduction until the masses can buy low-cost working tech-junk? Words and ideas I offer here may be used freely and without attribution.