That’s the idea, yes. But it should be pretty obvious that it doesn’t work, for the same reasons QE doesn’t. Because banks can’t actually ‘loan out from reserves’ to their customers (they can loan reserves to other banks, but can’t to anyone who doesn’t have an account with the central bank). It actually can’t be made to work in terms of accounting operations. The role of reserves is settling transfers, so the bank obviously needs to have them as part of the process, but that happens later, after the loan is written (which creates the asset (loan) and liability (deposit) on the bank’s balance sheet). So having excess reserves doesn’t really increase the bank’s ability to extend more loans anyway, and taxing reserves just makes the bank want to buy more equities to get a positive rate.