In the speech that the Governor of the Bank of England eh, Mark Carney, didn’t give to the Mansion House in June he devoted some considerable time to the general topic of shared ledger technology, even going so far as to say that
In the extreme, a [shared ledger] for everyone could open the possibility of creating a central bank digital currency.
I am not sure that I completely follow Mr Carney’s logic here and I don’t have the benefit of the expert advice that he must have received in connection with this statement but as far as I can tell, there are two entirely separate issues to examine here. The use of the distributed ledger for RTGS, which is the context in which it is mentioned earlier in Mr. Carney’s speech, is wholly unrelated to the provision of a central bank electronic currency and whether it might or might not be a good idea for the Bank of England to create such is nothing to do with the technology.
I suspect that the confusion may have arisen because of the tendency amongst management consultants (and others) to conflate the two entirely different kinds of electronic money: a crypto currency and a digital currency are very different things. If Mr Carney were genuinely suggesting that one of the scenarios under consideration by the Bank of England is that it abandons its responsibility for managing the creation of money and instead turns to a crypto currency, even if it is a crypto currency that is produced as a byproduct of a double permissionless shared ledger spawned by the Bank of England itself, then the value of that currency would not only be beyond political control it would be beyond the Bank’s control and one might imagine the Bank to be somewhat redundant in such circumstances.
The Bank of England is absolutely right to be exploring this new technology and I certainly think that it has something to offer. But that does not mean that the Bank of England is going to start using Bitcoin as a settlement system or that bitcoins will replace Sterling!
On the other hand if Mr Carney were genuinely suggesting that one of the scenarios under consideration by the Bank of England is that it creates a digital currency, then I say more power to him. I cannot think of a single reason why such a digital currency would be a crypto currency or why it would be in any way related to the shared ledger used to process the payments, but that doesn’t mean it wouldn’t be a cracking idea. A digital currency platform with right APIs in place (providing risk-free, genuinely instant and zero-cost transfers between accounts with final settlement in central bank balances) would be an amazing platform for a Digital Britain.