We've the precedent of a country declaring itself bankrupt. So, what if they all do the same, how would that affect the central banks (the Rothchilds, Mellons, Rockefellers etc?). Do we care?

In real life, for us, if you are given a loan that you obviously cannot repy, then the loan is cancelled by the court. I reckon the more these banks lend the governments, the safer we are....