Secondary purpose: CBDC / digital euro training wheels for policy-gated currencies with No Buy lists.
Isn't this how EBT vouchers already work in the US?
In theory, democratic capitalist society offers non-zero paths to upward mobility, for welfare recipients to re-enter normal society and earn national currency for market use.
As WeChat and social credit systems have shown in China, widespread adoption of digital payments tends to reduce acceptance of less-restrictive payment alternatives.
Time will tell if CBDC aspirants can displace incumbent currencies, or if CBDC users can have the same upward mobility hope as EBT voucher users.