It's hard to pay door kickers when citizens move to an underground barter economy. Note that the fiscal cliff includes major cutbacks in federal military funding, to the point that the Pentagon just sent a letter to Congress last week saying that more budget cuts will result in unacceptably low readiness.
Since we're going to have to cut federal budgets sometime, and revenues are GOING to fall, and there's no way to get the guns away from the majority of Americans in the next four years, I'd say that insolvency is going to rule the day if we don't take conservative measures. Think Russia and their fall from communism. That's the kind of government collapse we'll likely have.