Stick to the steel man.

If our cash system deems dollars with certain serial numbers worth only $0.80 because they have history in the illicit drug trade, that cash is no longer fungible.

How is that functionally different than a system where a dollar of essential goods suddenly becomes $1.20 across most sellers for a particular consumer due to reliable inferences from an digital dossier inaccessible to the user?

In both cases, consumer confidence suffers. The biggest difference I see is that there's a rabid contingent who correctly yell, "Don't fucking mess with that!" with regard to currency fungibility, and a bunch of people saying, "It's complicated," with regard to surveillance capitalism.

Edit: again, to be clear-- I'm talking about individually tailored prices insidiously affecting large numbers of consumers in a consolidated industry for essential goods.

Edit 2: I know surveillance capitalism isn't the same thing as making currency be non-fungible. I'm looking for insight on what the difference is in terms of consumer confidence and other economic impacts.

Edit 3: clarification to narrow my question. If you can't tell yet, I'm earnestly looking for knowledge from someone who studies economics.