As far as I understand, all the commercial banks need to do is to make each other 'whole' within the central bank at the end of each trading session. If they have been lending at about the same rate, then they literally create new money as debt. If they need to borrow money (if they have been lending more than the other banks), then they can get a loan at very favourable rates from the Central Banking window.

For a cultural protestant - who accepts the concept of interest payments as compensation for the foregoing of using of the money lent - it is an abomination.

And the root of all our problems - it will never get discussed, and if it ever did in some kind of special way in the public arena, it would be discussed by the same people who will label you a heretic for calling a fella with meat and two veg a man.