I don't expect bank A to care about transactions between banks B and C, so the distributed blockchain doesn't sound very useful. Maybe for more efficient netti

I don't expect bank A to care about transactions between banks B and C, so the distributed blockchain doesn't sound very useful. Maybe for more efficient netting? If A owes B $100 and B owes C $100 and C owes A $100 then no money has to ever change hands, even in the sense of crediting or debiting accounts at the central bank.