Realtime mass surveillance of every party who receives money is isomorphic to realtime mass surveillance of everyone.
Every person who sends funds received them previously and is sending them to someone who is receiving them.
Taler's surveilling is continuous, unaccountable, and operates without any due process what so ever: No court is required to authorize surveilling your records, nor can you even detect it to fight the intrusion.
The claim that the mass surveillance is required to enable taxation is outright untrue and inconsistent with longstanding practice. Taxation, including sales taxes, existed for a long time before low privacy electronic payment networks existed.