You mean the international development fund that's being raided right now? You know that it exists because US realized that it's cheaper(as in - LESS money spent overall) to help countries develop, so that US is less likely to engage militarily with whatever conflict happens in those countries eventually? It's part of being a global hagemony - it's not insane, it's just good business strategy. Out of all people, Musk and his cohort should be able to see this.
>>That's a lot of money that could go towards not being in debt.
The whole idea is that you'd be in more debt if you didn't do this, because you'd spend another trillion dollars on yet another conflict somewhere because people got fed up with having no access to fresh water and food and now there's a war that US just "has to" intervene in. Aid money is meant to explicitly prevent this.