I didn't mention inflation. It's unclear what the point of this comment is. As mentioned, banks use their central bank account balance for more than just buyin

I didn't mention inflation. It's unclear what the point of this comment is. As mentioned, banks use their central bank account balance for more than just buying/selling treasuries. It's used to settle payments between banks for example. Banks don't tend to buy groceries, but if they did they wouldn't use a treasury as a form of payment. They could use a central bank balance though, if you think about the payment system (US).