From John Mauldin in his blog, Mauldin Economics, Where is the Growth?
Yes, shrinking workforces, private-sector debt overhangs, and technological innovation are making it difficult to achieve “financially stable growth with full employment” (quoting Summers); but governments and central banks are themselves becoming an increasing drag on rich-world economies. Our governments have saddled us with excessive public debt, onerous overregulation, oppressive tax codes, and their attendant distorted market signals; while our central banks have engaged in currency manipulation and monetary-policy overmanagement. Those in power who rely on Keynesian policies almost always find it inconvenient to cut back in times of relative economic strength (as Keynes would have had them do). And if, according to their arguments, the economy is still too weak even in periods of growth to enable the correction of government balance sheets, then perhaps their reluctance has something to do with debt piling up, market signals being distorted, and governments being empowered to encroach on every aspect of the lives of their productive citizens .
Debt is simply future consumption brought forward. Another way to think about it is that debt is future consumption denied. But there comes a point when debt has to be repaid, and by definition, from that point forward there is going to be a period of slower growth. I have called that point the Endgame of the Debt Supercycle, and it was the subject of my book Endgame.