Those moralities might clash, but there may exist no neutral arbiter that can adjudicate: it may be that between equal rights, force decides.

Such a system would involve a neutral arbiter that would decide the merits of debt claims and process bankruptcy proceeding when countries no longer can service their debts.

But shouldn't our doctors be the neutral arbiters in this situation?

The standard positivist view of empirically acquired information has been that observation, experience, and experiment serve as neutral arbiters between competing theories.