Well, only 19 people have given more than $1bn to charity http://www.forbes.com/sites/luisakroll/2011/05/19/the-worlds... which leaves a lot of people not giving much away. The Russian oligarchs seem to like to spend money on football teams and mansions not alleviating poverty, while the Chinese rich do not seem to give much away either.
Well, running football teams and building mansions aren't necessarily wealth destroying activities. Football teams can be relatively big employers plus distribute lare amounts to players who then also buy expensive things putting more money back into the economy.
Many Chinese rich would be very large employers. Also their culture of saving allows the US to continue spending outside of their means, for now.
The Fed is the only thing that allows the US to continue to spend outside its means for now (including the biggest spendthrift of all, the US Government), and more specifically the dollar global reserve currency (or FRN).
The Chinese aren't buying any meaningful amount of our new debt these days. Mostly they just cycle existing debt, from long to short etc as it makes sense. Ditto the Japanese, who hold almost as much junk US debt as the Chinese.
Ah, I am certainly no expert on the subject. Just trying to make the point that even these rich that generally are holding onto their wealth for themselves would be actively attempting to destroy wealth and it has to be stored somewhere doing something.