Germany has bad experience with total surveillance and state power that misuses this information. Once through the Nazi-Regime and then the GDR (Stasi). We know how dangerous surveillance is, what desires it arouses and how easy it is to abuse. We've been through all this shit several times. Not going to happen again.

Germans are generally very concerned about their privacy and prefer that the state (or anyone) has little information about them. Hence, for example, the continued wide spread use of cash instead of cards. And the data protection laws, which are very strict by international standards.