However much some executive branch officials (in the US that applies to both federal and state/local officials, who operate with considerable independence), the constraints operate with considerable effectiveness for several reasons. In the first place, the relevant executive branch official largely share the underlying belief system and accept their legitimacy. Secondly, they know that when they do not, the results are quite likely to be challenged in and rejected by a court where they are offered as possible evidence, along with any other facts they can be seen to have led to. In short, executive branch officials (i. e., police officers and prosecutors) have to live with them; it does not matter whether they like that.
My original point, though, was that it is unseemly, perhaps even hypocritical, to celebrate privacy breaches committed against those one dislikes and condemn it when done against those one favors or innocent bystanders.