I’m not sure that you understand my point. Spending money on military is an economic gain for the USA, for every cent spent they gain dollars in returns. It’s a “good” investment (from an amoral financial perspective, as said above, the ethics are appalling). Another country who spends less but also has a return to their economy less than they spend (like North Korea) is a bad use of taxpayer money. The amount of spend/return isn’t relevant, the ratio is what matters.