@jedsetter @dmantis @aj @liamvhogan this is a good point.
I reckon 80% of the financial interactions I have day to day cannot happen purely in cash:
-mortgage
-insurances
-dental/medical (goes through medicare, requires ID)
-medications/prescriptions (goes through pbs)
-vet/veterinary medicines (requires ID because controlled substances)
This essentially just leaves food, petrol and any luxuries. We always buy our food and petrol from the same people and they know our names, so that train has sailed. There's nowhere around here to buy anything that could be considered a luxury.
Plus of course getting paid is a financial interaction. People tend to want to know identity details for the person they are paying, even if they pay cash. It's hard to get paid privately.