Placed my post in this thread as it is more logical:
Aside from keeping us safe (which I wholeheartedly support but think we're overdoing) there isn't much ultimate economic benefit to the military spending besides the spending itself.
A journalist once asked the Coca Cola company if they were not overspending on publicity/marketing. The answer was: yes we overspend at least 30%, but the problem is that we don't know where the overspending exactly is situated. Overspending is cheaper than cutting on the wrong place and lose marketshare and $$$. Overspending is cheaper than underspending till certain limits.
Same applies to military. We start from past experience to decide where and what to spend. Only after a new war, an evaluation can be made and it becomes clear what was good spending and what was a waste. It is always difficult to estimate what the exact power and options are of the enemy, so we have to guess a bit to decide what to spent on what.
It would be interesting to review this post in the actual situation. Maybe soon it will become clear if spending was a waste or not. Let's hope we will not find it out, because to find it out horrible things should happen. US-Russia confrontation...
Don't forget that Trump wanted to reduce or even leave the NATO. No wonder Putin was his best friend. Trump does what Putin does in Russia: lie and manipulated people. Trump tells all the time FAKE NEWS, just like Putin does.
Reelection of Trump will have very serious consequences for America's safety. I hope that the brainless Republicans understand that. But probably they will react as the millions of brainwashed Russians that support Putin.
Imaging Trump would be now President, that would make things much easier for Putin. Maybe the US (and the Western world) escaped a huge drama by electing Senile Joe. Senile Joe is better than mad/corrupt Trump who would probably forbid to help in the fight against the Russians. Trump wanted the US to leave NATO, weakening both the US and EU.
Putin helped Trump as much as possible to be reelected. The timing was perfect and fitted in his plan to invade Ukraine. We were lucky that Putin's plan did not succeed.
I hope Americans realize they need Europe as well as Europe needs them (economically and military). Europeans are at this moment damaging the Russian army and dying for that. Not Americans. And to fight the China/Russia armies, the US can better have Europe on their side than Europe on the sidelines. Or even worse: Europe invaded by Russia.
Europe adds about 400 million people to the US side, not a small detail. Economically (how many billions, US companies make in profit each year in the EU market?) but also military.