Answer this question: Is there any data that you want to be **completely unavailable** to law enforcement with **proper warrant**?
Definitely! There are protections, or used to be, that made certain information totally off limits to law enforcement no matter what kind of "proper warrant" they might have. One example: conversations between husband and wife.
In your world, there would be no such protections.
Our military and law enforcement absolutely must be able to use all means to catch the bad guys.
So now everybody is a "bad guy" - and the military and law enforcement can do anything to us?
It is important, very, very important that we keep in mind that you can't "catch the bad guys" if you become the bad guys. If the military and law enforcement break the law to gather information, then they are the bad guys!