This proposal is equivalent to just having society never forgive debts. If society doesn't ever forgive debts, you can still do the equivalent to case 2 by simply writing a normal contract and adding a clause saying that the debt is cancelled under these conditions, then listing the same conditions that would cause society to cancel it under your proposal.
So we've already had this. It didn't work well.
This proposal is equivalent to just having society never forgive debts.
Nope, the second type is just a bond with an embedded option to not pay if you can convince the politicians you shouldn't. I expect it to be very expensive :-/
As to never forgive debts, well, there is a reason for bankruptcy laws. Blood out of stone, and all that.
Another month, another rationality quotes thread. The rules are: