“Also worth mentioning is the current push by the Bank of England towards central bank digital currencies (CBDCs), in which buyers and sellers would transfer money directly without having to use the banking system. This could enable central banks to encourage or discourage certain spending in more targeted ways, for example by restricting what can be spent by people in certain areas or income brackets. If inflation was controlled using only fiscal levers, CBDCs could be used to reinforce this policy.”

https://theconversation.com/interest-rates-the-case-for-cutting-them-permanently-to-zero-209427