Re: Techies will continue to sneer.
Yep. While it is true that a politician does not need to know the mathematics behind encryption, especially the more head hurty public/private key arrangements, they do need to understand the basic concepts of security and reality. If a mechanism, any mechanism, is designed with a catch-all bypass which is "protected" by keeping this mechanism "secret" then the mechanism is no longer secure and this bypass mechanism will find its way out to big, bad world.
Would Ms Rudd require that all door locks produced by locksmiths selling locks for use in the UK share a common master key, copies of which are stored in Ms Rudd's office, in all police stations (just in case), in the glove boxes of all emergency vehicles (just in case), in the cabinets of all utility companies (just in case), in the offices of local councils (just in case - terrorists and kiddie botherers y'know) and of course various very reputable* private security companies such as G4S (just in case one wants to outsource things).
Ah... Ms Rudd would think this is a good idea because she is unfeasibly stupid and would lose an intellectual challenge against a tub of lard and can't of think anything beyond a police state. Damn. I think I may have sneered. My bad.
* "Reputable" doesn't necessarily mean having a good reputation...