International security is important, and military defense spending is a large requirement for that; despite all the propaganda I personally still view the U.S. and the west as positive forces for democracy and freedom; although certainly I'm no fan of 'pushing' these on other countries; I think it's always better if the benefits of democracy and international co-operation can become self-apparent and lead to self-guided regime change.

But assuming anyway that the spending is a requirement - the question becomes how efficient that spending is, and where the money is really going. If it's being spent efficiently to support defense operations and capabilities, that's great - if it's going to line the pockets of contractors and corporations spun up largely to capture wealth, that's not so great (for many cases it's probably somewhere in a spectrum).

Re-investing whatever efficiencies can be saved from careful economies into both better military infrastructure and civilian infrastructure seems like it'd massively benefit everyone. (although worth noting that cost-cutting itself also has to be done in a way that doesn't impact security; in some cases I can imagine that defunding risky or questionable projects could in fact improve security)