Eliminate cash and the eiltes/bureaucracies/IRS will be able to keep track of every single personal property transaction/garage sell, book buy, gun transfer or whatever-—so they can monitor (and eventually control) every single private action and tax you or “watch” you-—or put you in prison, or whatever.
You will never have the ability to be private (have dignity of any sort—you are an object of the State/bank).
That way-—in the Brave New World-—they can isolate and target and kill all their “enemies” easily-—they have no ability to buy anything if the bank shuts them off-—people who believe in self-reliance/autonomy.
Anyone who is not willing to be a “happy slave” of the elite sodomites can be totally controlled.
Note that Bills are serialized and could be easily tracked with the tech of today.