What many people in Germany want is a payment system that is as anonymous and is as hard to control by some untrusted entitity (both government and banks are very distrusted) as possible and what cash offers. That's basically cash.
Not without reason, in Germany there exists the well-known phrase "Bargeld ist gelebte Freiheit" ("cash is lived freedom").
Any other payment method will not give customers any benefits over those methods. Unless banks are willing to take responsibility for fraud like with card purchases.
"designed to be anonymous for the payer, but payees are always identified"
Why not anonymity for both sides?