With the current legal uncertainty around whether your fingerprint or retina scan locking your device has the same legal protection as a passcode - do you _really_ think every Three Letter Agency isn't operating under flimsy legal advice that "papers" does not include anything stored digitally? "The rule of law" is _very_ open to interpretation... (And it's not like parallel construction isn't a well known tool used to hide questionably legal (or outright illegal) law enforcement activity from whatever limited oversight they have anyway... A "Superior system of governance"? My opinion differs somewhat there...)