Ponzi schemes are much more common in nature than humans like to think. The default population dynamics for most species are feast-or-famine: population grows exponentially until it exhausts all available food sources, and then mass numbers of individuals die off all at once, leaving more resources for the survivors. Hell, life is a ponzi scheme: our cells divide, accumulating genetic mistakes (= technical debt) each time, until our body's ability to repair the damage is overcome by the accumulated mistakes. And then we die, hopefully having produced a fresh new individual to repeat the process.

Assuming no great technological breakthrough, the same thing will happen on a societal level: we'll die. But then, we knew there was 100% chance of that happening from the beginning.