This is a totally ass-backwards way to do stimulus and domestic investing, with the upside that it lets you do stimulus and domestic investing while pretending you're not doing it, but doing something macho and patriotic instead.
This is a way to maintain US economic and diplomatic dominance while pretending it's all about Defense/The Homeland/Freedom(tm), all while telling all those soldiers busy getting killed and wounded by (who this time?) and killing bewildered probably innocent (whooo?) that this is all about loving and defending your country.
If you can't openly sell empire to your citizens, maybe you shouldn't have an empire.