I’m not going to argue specific dollar values for an appropriately-sized U.S. military, because I don’t know what that might be.
I do, however, want to talk about the process of determining how much military you need.
Some principles:
-
It’s not about jobs. It’s about having a military that can handle the threats you might face 20-30 year in the future as well as now. If that means cutting soldiers and spending more on research, that’s what you should do. If it means recruiting more soldiers, then that’s what you should do.
-
It’s not about what else could be done with the money. Defense of your nation and its interests is critical, and trumps just about everything else. Of course, there’s a limit to what you can afford, but the military isn’t just another program to be horse-traded for something else. You evaluate it on its own merits.
-
It’s not just about defense of the American mainland. America is in no danger of being invaded. Not now, and not in the next 50 years. No one could possibly manage to land an invasion force across an ocean. A herculean allied effort managed to float an invasion force across the English Channel, and it’s still considered one of the greatest logistical and engineering feats man has attempted.
-
It’s not just about the potential threats to American interests as they exist today. It’s about the potential threats that may exist in the next 30 years; that being about the length of time a real military transformation takes these days. Military leaders today are trying to figure out how they might be attacked in 2040.
-
It’s not even necessarily about an actual shooting war. The whole point to a ‘Pax Americana’ is to present such an overwhelming superiority that your enemies don’t even bother trying to build a military to counter it. It’s tempting to look around the world and see no threats, and assume that means you can drop your military posture. But that begs the question, “What if there are no threats because of your military posture?” The smart thing to do is to determine what the threats would be under the assumption that you downsize the military. What aggression does it deter today that might flare up if other nations thought the U.S. had lost or was losing its ability to defend its interests?
-
It’s also about non-proliferation. Very few countries have the bomb, and that’s largely because the U.S. has agreed to protect them. If the U.S. withdrew from Asia, you can bet that Japan and a number of other countries would start work on nuclear weapons tomorrow. The U.S. is the great equalizer. Take that away, and countries will turn to the next great equalizer - nuclear weapons.
You can’t just point a a dollar amount and say, “That’s too big”, or “We can easily shave 200 billion off that” or whatever. The proper analysis is to look at all the threats the U.S. faces, and the cost of countering them.
The situation is much more complex than that. Americans depend on the world for their standard of living. Americans also need the world to remain stable and relatively peaceful.
My specific worries are whether Russia would make a serious play to reconstitute the USSR, whether China would start to move against Taiwan, whether the North Koreans might see an opportunity to start playing even harder brinksmanship games against South Korea, whether Russia might make a play against Canada and the U.S.'s interests in the North (especially if the Northwest Passage opens up fully), and whether we’d start to see aggressive moves to control oil distribution in the Middle East and South America.
I think it’s likely that the U.S. military can be downsized somewhat, but what you really need is something like the base closing commission of the 1990’s, made up of serious thinkers who have decades of experience in defense and who aren’t politically tied to big military programs that benefit individual states. They should do a complete review of the current forces and the future threats (in consultation with generals), and then make hard recommendations.