If Big Brother is listening to everything was say and everything we do, why do we have crime?

[djean111]

2. I don't think they are listening to everything. Not possible, especially in real time.

The data collection seems to be most useful for after the fact or for watching/listening in on actual suspects.
The only way your scenario would work is if we were living in the Tom Cruise "Minority Report" world, or The Truman Show, and there were bugs and cameras literally everywhere, not just in convenience stores and ATMs, etc.
I don't think most rapists and robbers and murderers make phone calls about what they are planning to do; I think most of those crimes are secretive and impulsive. And I believe detectives can request phone data concerning suspects and victims, and that data is useful.