> There is no downside here form the US perspective. Every dollar spent is returned in ways that no other expenditure could replicate.
Suppose we gave "American aid." Instead of giving military items to Ukraine, we pick the names of 10 millions of Americans out a hat, and buy them things. Only restriction is it has to be made in America.
This has all the same effects on the US economy as military aid to Ukraine. It pays the salaries of some people in the US. It uses some raw materials that we have to buy. It costs us in taxes. It diverts some labor to whatever we're buying for the American consumers, and away from all other industries (this can be inflationary).
But the difference is, at the end of the day, those 10 millions Americans have something they didn't have before. America is slightly richer than if we'd given stuff to Ukraine.
So the aid to Ukraine is more beneficial to the US than if we were giving Ukraine money to buy Chinese goods, but still less directly beneficial to the US than if we spent the money on ourselves.
P.S. Like the grandparent post, I'm not bothered by this. I think it's appropriate to aid Ukraine, but it has a real cost to the US. I'm just bothered by the fact that you're so loudly getting the economics wrong.