Yeah, people forget bills have a serial code, and if shops were required by law to validate them you could still mostly track all the money

Cameras and other means of tracking cannot remove me from commerce. The problem isn't just the tracking. Cash requires no oversight to transact. If I am required to use a payment network, there are many third parties who get a say in what I can do. That's the biggest issue.

On the plus side, once cash is de facto outlawed, the US Supreme Court will be forced to finally step in on the subject. The removal of cash will force banks to authorize bank cards and accounts, no matter who. A bit later after that, they will be forced to give access everyone access to payment terminals and gateways.