Yep. It's also interesting that some transactions are taxed, and some are not. Some types are taxed at higher rates than others, etc. And despite living in a wo

Yep. It's also interesting that some transactions are taxed, and some are not. Some types are taxed at higher rates than others, etc. And despite living in a world (at least speaking of the US) where the IRS has all these explicit rules about how to tax various transactions, and they get all kinds of reports sent to them by all those financial institutions in order to double-check that everything is reported correctly, we still have a world where people can engage in cash transactions, and there is really no effective way to track and enforce taxes on cash transactions. Not in the general case.