Because we'd have to change the fundamental nature of the military in order to enact significant cuts. In order for us to continue being able to project overwhelming military power rapidly around the globe, we have to have bases all over the world, and those are expensive. We have to have ordinance available to go at a moment's notice, and that's expensive. We have to have personnel ready to go anywhere at any time and that's expensive. If we changed the military to defensive only and allowed the rest of the world to duke it out amongst themselves, we could seriously cut military spending.
So, we have a choice, keep spending big bucks, be the world's police force and enforce a semblance of peace, or cut back and watch the world's enemies kill each other in mass slaughters. Naturally, those who want to cut military spending now would be horrified to watch the disasters unfold and Uncle Sam do nothing.
You wanna know why defense is so expensive these days?
I saw from the inside how we active duty personnel were being replaced by highly paid government contractors.
Our military is becoming a privatized, very expensive mercenary force.
I mentioned in another topic how Raytheon uses propriety fasteners on the systems they sell to the military.
Ordinary screws? Oh hell no.
Did they provide us with the necessary propriety tool to open their cabinets so we could repair OUR gear? Oh hell no.
We had to expend taxpayer dollars to have a highly paid "tech rep" fly out and open the cabinet for us. Then he just stood around while we made the repairs. Then he closed the cabinet and flew away.
I shit you not.
This is only one of countless such example I could give you.
When I retired, I went to a job fair. Since it was near the base, it was almost exclusively defense contractors.
Raytheon was there. They had a sign up saying they need to hire someone with a very specialized skill. I walked up to them and told them I was one of only a dozen or so people on the planet who had that skill.
The guy literally followed me all around the convention center, begging me to take the six-figure job.
I told him I was aware their tech reps had big houses and fancy cars, but that they also were rarely home.
He said, "What if I told you you'd only be away from home three or four days a month?"
"I'd call you a fucking liar." That finally made him go away.
I ended up joining a civilian company way the fuck far away from any defense company.