[noxer]

This assumes that people involuntarily paid for the last 60 years or so but they didn't. USAID was paid for by money printing and more debt making not by taxes. If you want volunteer to chip in they would first need to pay of the debt causes by USAID over the last 60+ years.

Also lets be real here, no one in their right mind would donate to USAID. There are near unlimited way to donate money for good causes and very specific ones, where you can see results. If your goal is to have your money be efficiently used to help people you would never give it to the government. Any other organization that isn't straight up a scam, will be more efficient than the gov.