The consequence of abolishing cash seems to be total financial control and that is a bit like arming the police: of course you might need military equipment for fighting a cartel.
But applying it to daily operation is very cruel to parts of society.
There needs to be a statuary right to be serviced by the banking system. This is in addition to escape valves such as cash and crypto.
This would ensure everyone had access to direct-deposit payment (eliminating most of the case behind the "it's almost a real bank account" prepaid-card products with exploitative fees) and create a single huge audience to target for "over the top" services to develop.
Perhaps it could be put together as a "portable" service-- you can link your state-bank account with your preferred brick-and-mortar to handle cash and in-person services. There would be phone-number style portability, to encourage them to compete for most features/lowest fee/subsidy requirements.