Better than not, but how much can you trust the word of a third party auditor in a world where government intelligence agencies conspire to spy on each other's

Better than not, but how much can you trust the word of a third party auditor in a world where government intelligence agencies conspire to spy on each other's citizens because their laws expressly prohibit on spying on their own... where the (one time) worlds largest supplier of cryptographic hardware was covertly owned by the CIA and shipped backdoored units for decades, where our national standards bodies make standard backdoored random number generators, and where the US government used a sham vaccination campaign to collect genetic samples from a whole community in order to locate and assassinate a single terrorist. When it comes to keeping data private we face adversaries whos only rules seem to be what they can get away with. Against that, full transparency when it comes to the construction of our security infrastructure really needs to be the starting position.