The median income worldwide is around $10,000 and a third of the world lives on less than $2/day. If you want to help the underprivileged you have to or your money has to leave the US.
And you just have to make sure that any charity you donate to doesn't eventually get revealed to have been a sham where the people running it were secretly funneling the money to armed militants without your knowledge because then you can go to jail for the rest of your life (unless of course your name is Reagan and you funnel arms directly to the militants yourself!)
And you just have to make sure that any charity you donate to doesn't eventually get revealed to have been a sham where the people running it were secretly funneling the money to armed militants without your knowledge because then you can go to jail for the rest of your life (unless of course your name is Reagan and you funnel arms directly to the militants yourself!)