Earlier quoted context omitted.
At first glance, bank balance sheets are unintuitive and feel 'the wrong way round'. When someone deposits $1m at a bank, the bank doesn't have $1m more assets, it has $1m more liabilities. (Yes, this is a gross over-simplification)
Not an expert, but was having some thoughts. Let debt be a graph where the nodes are people (with ledgers) and the edges are all of the form "alice rents $x from bob for y% APR". Actions that resolve/relax graph are payments of the form "alice pays bob $z", that lead to all balances being 0. Let the edges decay to null when balance is 0, such that a 'resolved graph' is simply a list of nodes with no edges, meaning 'n…
If I'm not mistaken, Debt: the First 5000 Years and the Dawn of Everything books examined this.
Your graph is a formalization of such relationship, no?