While I get that military R&D occasionally produces tangible benefits to society, I suspect that if we poured 5% of the military budget into the state department and actually tried diplomacy more often, the rest of the military budget could get cut at least in half.
Because of the level of corruption and the amount of money to be made by military contractor grifters, this isn't going to change. Better to build better ways to kill people than to solve things like poverty, mass mental illness and so on. 'merica fuck yeah and all that.