This is going to come out. Not if, just when.
When it does - lots of local heads will roll. Politically, not literally.
The scope is very large. The level of participation is very large. The value of a leak is huge, so the first leaker wins the lottery - made for life. Do police get paid enough for that to make economic sense? nope.
The blowback for those who administer this outside of "required to cooperate" is huge. The only response of the leaders that gets them off the hook is to pass that buck upward. "The law made me do it" or "the feds made me do it" will save their careers, some.
Eventually it has to break. How is it handled at that point?
Look at the NSA/Cisco/IBM related consequences of Snowden and imagine that at a local level.
That or those who rule by consent of the governed would want to educate and train the people (not serfs) under them so that there is sustainable rule of law AND good quality of freedom enjoyed in the land of the free, home of the brave, place where justice wears a blindfold. Too bad those way up in power are less interested in that quality - they are the ones with the greatest ability to support it.