My point was that in today's global economy and huge trade deficits, the effect of the consumer's dollar on local economies ain't what it used to be.
Imports are ~15% of US GDP, lower than the rate of many industrialized countries pre-globalization. Changes in domestic demand primarily affect domestic business and there aren't really any empirical or theoretical evidence to think that's changed in the last few decades.
If you are so concerned about aggregate demand, why wouldn't you favor a centralized government to have more revenues to act accordingly?
Because 1) that's not how aggregate demand works, and 2) the government doesn't need to have money to spend it.
Government's contribution to demand is spending minus revenues, because taxes decrease private consumption. In other words, economic stimulus
is deficit spending by definition, whether that deficit is created by tax cuts, higher spending, or both.
To the degree that the government should have sufficient revenues to pursue stimulus, I (and most liberals) believe that we should move towards a balanced budget in times of full employment. Both because persistent deficits can have bad side effects during normal times, and because keeping the debt/GDP ratio down means there will be more leeway for aggressive fiscal policy during recessions. But it's important to note that even though the last administration pissed away the surplus, it hasn't caused the problems that would make us need to shift towards austerity: inflation is so low and the demand for bonds is so high that, as AdmiralViscen pointed out, the federal government can borrow money at a profit.