Only nations like Israel and Switzerland could possibly support having one tenth of the populace be in uniform in some fashion or another. Even China, with all the people they could "use" doesn't have the resources to maintain such a large standing army, so applying this to the United States would not be a wise idea.
Besides, this opens up the other reason why national and economic collapses can be prevented because of a large armed force: military coups and juntas. Martial law can be a pretty powerful force.
Right-Wing liberal, slow progressive, and other contradictions straddling both the past and future, but out of touch with the present . . .
"We also know there are known unknowns.
That is to say, we know there are some things we do not know." - Donald Rumsfeld