it's a way of central banks taking back control of the currency system from mastercard/paypal/yourbank/etc.
there should be no reason we need banks to conduct basic tasks which are increasingly digital only.
irrc, proposals do not include any mechanism to reliably associated transactions over time with an individual's identity.
if implemented it would increase privacy, as it would deprive banks/online middlement/etc. from having your transaction hisotry
which is usually trivially accessible by law enforcement anyway