If you don't support prohibiting fully electronic cash and don't support mass surveillance, I don't see why you would support a surveillance payment system that

If you don't support prohibiting fully electronic cash and don't support mass surveillance, I don't see why you would support a surveillance payment system that could only gain market adoption by the government banning its more private alternatives. As to your second point, one may be inclined toward socialism, and so prefer a more fully government controlled, less corporate friendly brand of totalitarian mass-surveillance.