Well Bezos donated 12 billion already, and who knows how much more he will donate. He probably couldn't donate every year that amount, so if you say in 20 years

Well Bezos donated 12 billion already, and who knows how much more he will donate. He probably couldn't donate every year that amount, so if you say in 20 years it is 150$/20=7.50per year which is less than a dollar per month (admittingly this is everybody in the US). This is a lot of money for a lot of people but I still believe the total possible donatable wealth of non rich people is orders of magnitude larger than rich people (couldn't find good stats, was looking a while ago)