Let's make up some silly numbers.
Suppose the national debt was, let's say, 1,000% (ten times) annual GDP. And suppose the budget deficit was, let's say, 50% of GDP. And suppose your economy hit the Zero Lower Bound, and suppose you thought that your own central bank's monetary policy could do no more to increase aggregate demand, but more aggregate demand was needed.
1. Would those numbers lead you to hesitate before recommending tax cuts or increased government spending to increase aggregate demand?