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In 2005, several central bank advisers, including Charles Kahn, wrote that the key social function of cash is to protect the purchaser’s identity and that, even though banknotes may get displaced, users would push for their survival (Kahn, McAndrews, and Roberds 2005). However, the ensuing decade seemed to change Kahn’s mind. In 2017, he wrote,
When central banks first took on the job of note issuance they became privacy providers.… As they try to get out of the paper money business, I think the future of central banks and payment authorities is no longer in privacy provision, but in privacy regulation [Kahn 2017: 11].
That regulation is subject to constant negotiation and an observable erosion of citizen rights. In fact, in 2020, Kahn pushed his opinion even further away from a defense of privacy writing that an anonymous CBDC would pose “security risks” to users (Kahn and Rivadeneyra 2020: 3).
From Financial Freedom and Privacy in the Post-Cash World | Cato Institute:
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I don’t think this is at all surprising, because I have been through the same weighing of the evidence and similarly changed my opinion.
Electronic cash isn’t like physical cash and presents much greater risks to society