But does that money actually exist anywhere other than on some balance sheet.
Imagine 3 banks, a b and c, a borrows £10billion off of b, b borrows £10billion off of c, and c borrows £10billion off of a. There all paying interest to each and loaning the money out to others, so theres a combined debt of £30billion. One day a computer glitch means that another bank d mistakenly pays £10billion to bank a. Theres now a combined debt of £40billion.
The banks decide to clear their debts, so a pays b £10billion, b pays c, and c pays a. Bank d discovers the mistake and demands the money back from a, and a give the money back.
So the situation now is the £40billion debt has vanished, no bank lost any money they have exactly what they started out with.
I think we are witnessing the biggest con the world has ever seen. And the first step should be make every bank settle all interbank debt.