I gave several real, amoral, and tangible examples to explain why we should respect old debts in the current day, as it allows us to use the tool of currency to facilitate trade. No moral arguments are needed here.

You are also still trying to assign the idea of a specific debt being somehow more relevant than a specific pound coin. Due to the way nations create and balance currency exchanges this doesn't work.

It's simply not true to say we are paying for an old debt at a national level. The creation of a debt at a national level is similar to the creation of currency, this is immediately balanced by how people we trade with view the currency. This is all resolved at the time it's created...

You seem to think a nation is just a very long lived person, taking out specific loans from other people, but again; it's an abstract group that uses a floating currency to settle large trade agreements over time.

Because these agreements are made in currencies that are also abstract, it works.

These are all material concepts, not moral ones.

A collection of individuals all have their own moral choices to make, the "group" is just a convenience, it does not make moral choices. You cannot extend the idea of morality past the individual without a good justification.

Especially in the scale of a nation (where membership is non voluntary), the current members did not make any moral decisions that occures in the past, so trying to assign culpability to the current nation is flawed.

This is why these ideas are not compatible.