Itspublicdebt weighs less heavily onmarketsbecausemuchof it isowned byItalians, whose highsavingsmean thataggregate public plus privateborrowing is in line withothereuro-areacountries.
Since you appear to have focused of the gloomy scenario where aggregate retirement savings is insufficient cover aggregate retirement expense, which I agree is a distinct possibility, I will focus on that case as well.
This of course is called inflation, and the greater the deficiency in our aggregate retirement savings, the greater the amount of inflation we can expect.
Needless to say, even modest efficiency gains in the built environment typically translate into massive energy savings and emissions reductions in the aggregate.