History has also shown us time and time again that absolutism isn't orthogonal with reality. Absolute privacy still results in tyranny, you just won't see it coming until it's far too late.
I don't know what to tell you other than the fact that "lawful intercept" only became lawful in the 1970s and that the laws/modern law enforcement techniques you think are saving us from anarchy are relatively new. In the UK wiretap evidence isn't even admissible.
