Earlier quoted context omitted.
But, isn't standard Bitcoin completely traceable, once you move funds out of your wallet to fiat? Can't they track you down retroactively after you make that one transaction?
Tracking you down retroactively is very different from freezing your bank account so you miss your rent payment. Also, generally, no, fiat-currency cash transactions are not completely traceable, and in practice there doesn't seem to be a Bitcoin-oriented equivalent of https://cdn.occrp.org/projects/suisse-secrets-interactive/ , at any rate not yet.
It's supposedly anonymous to the payer, but traceable to the payee. The idea being to provide privacy for consumers, while allowing governments traceability for tax purposes. It acts like a gift card and reminds me of the Chiemgauer[1], a very interesting regional scrip that traces back to Freigeld[2].
While GNU Taler seems to be focused on anonymous consumption, the Chiemgauer is a balanced electronic medium of exchange. It doesn't have the privacy aspect of the Taler, as far as I know.
[0] https://en.wikipedia.org/wiki/GNU_Taler