Exactly the problem with such technology is that someone is going to be abused by some disgruntled official, political machinations to spy on rival politicians...etcIt's not about the technology. It's about who uses it, and who gets to use it.
USA has a lot of checks and balances, with 3 independent levels of the state, along with a free press, and activism. Abuses in US happen less frequently and at a much smaller scale.
To top that technology is not perfect humans will manipulate it to fit their thinking. If you think someone is a terrorist you will spend time & effort to create evidence that he is a terrorist not because he is one.