The battle for cash is not a conspiracy, for the major banks are keen to see it gone, to be replaced by a Central Bank Digital Currency (CBDC). Prior to the introduction of that there will need to be the establishment of an Australian national digital identity.
The big banks have all said that this will be more “convenient” (for them, of course), and for people connecting their banking ConnectID, myGov, and state government apps. As far as I understand it, this can be done without an Australian national digital identity, but any excuse will be given for this until it is pushed in. The government consultation on the Digital Identity Bill 2023, has ended and the Bill will be introduced into parliament within the next few months, unless a massive public backlash against it can end it, or at least slow it down, as has been done with the equally evil, Misinformation and Disinformation Bill.
