The US is able to do that now. Humanity as a whole should work to change that. Agencies like the CIA, NSA and whatever other group that does "clandestine" operations shouldn't even exist in the first place.
We achieve this by making encryption easy, powerful and ubiquitous. That will take care of their dragnet espionage.
We achieve this by making encryption easy, powerful and ubiquitous. That will take care of their dragnet espionage.