You see, people are betting that technological progress will take of everything. You can keep inflating and there will still be price deflation. Unfortunately, that's a rather naive notion.
Technological progress are not guaranteed. You have to work at it to ensure that technological progress outpace the bad behaviors of politicians.
It's clear that neither party in the US has the slightest interest in fiscal responsibility, not as long as it's a winning strategy to buy votes with tax cuts and free benefits. The only way I see to avoid the coming demographic and financial time bomb is massive economic growth, e.g. one or more of AI/robotics (replace most human labor), nanotech (make material goods much cheaper), and biotech (cure aging, radically reducing medical expenses and increasing productivity).
*excuse the cliche', trying to be concise.