.. I'm sure that 'Bill' has a 'heart of Gold'; And his recent pledge, is probably proof of that. But, aside from the rather obvious fact, that Mr. 'G' can do with his money, as he pleases. In an already greatly overpopulated world; And using the too many people, who sought refuge in an overcrowded 'lifeboat' analogy; Speaking for myself; Providing, 'free' or low-cost vaccines, to the 'third-and-fourth' world, impoverished {I assume}; Would Not make the 'numero uno' priority, on my own list.
 
Arguably, a better way to spend that, {if not by much}; Would be setting aside about half of that amount; To retrain, 40% of all 'US' lawyers, {already in abundance}; For other jobs. Not, that those 'jobs' are 'out there'?! --