[ephbit]

It'll take another 10-20 years or so, until we likely have sound evidence, whether the conclusion drawn from modern monetary theory - that forever growing national debt is not in itself a problem - is reasonable or not. Either we'll see that there's no problematic level of inflation or we'll see that there is too much inflation causing instability.

If somehow the evidence suggests that growing national debt is indeed a fundamental problem, then maybe some governments will be forced (by voters' will or by peer pressure) to ...

> ... settle for a currency that's out of their control ...

... because it'd remove the ever present temptation for politicians to promise short term gifts to voters that are paid for by devaluation of the currency and by shifting payback into the future.