This is pointless math instead of bad math. 0.1% isn't the issue, the issue is that it isn't actually paid by taxes, it is instead paid by money printing. It's not 0.1% of peoples taxable income going to USAID, it's billions in additional debt that is "funding" USAID.

The actual true cost to the people for the additional debt is hard to measure and likely hits a different generation that the people who created most of USAID. Instead of saying people payed 0.1% to fund USAID you should say they made at least that much additional debt every year. You could not spend 0.1% more than you earn over the course of like 60 years but USAID did that for everyone.