It could place providers in the position of requiring warrants for all law enforcement requests.
Wouldn't that reduce the labor/financial burden on the telcos?
The telcos must be acting at the request of politicians, in exchange for good treatment by the politicians on behalf of the telcos on other unrelated matters.
They laughed at Einstein. They laughed at the Wright Brothers. But they also laughed at Bozo the Clown. -- Carl Sagan