History shows that whenever surveillance gaps appear, chaos follows. The explosion of crime during early urbanization was the specific catalyst for the creation of modern police forces because traditional social bonds had failed to provide oversight in growing cities. Japan maintains its safety through a deep-rooted culture of mutual neighborhood monitoring that leaves little room for anonymity. Even China successfully quelled the violent crime waves of its early economic boom by implementing a sophisticated surveillance network.

Police forces nor "neighborhood monitoring" are equivalent to mass surveillance though.

Anyway I'm curious why - despite having less anonymity than at any point in history, at least from the perspective of law enforcement - we still see high crime rates, from fraud to murders?