Bring back ration cards I say. It's been a few years since I last saw mine. Haven't needed it since about 1954. It would be an easy thing to accomplish as it could all be computerised and linked to Nat Ins. No, passport, car reg, marital status and census data, and any gaps in the knowledge of government as to who and what you are could easily be filled in by google and probably your internet linked TV and computer.
If you keep schtum Alexa could easily be persuaded to betray you.
"Turn on, tune in, drop out" may be a counterculture-era phrase popularized by Timothy Leary but today society is permanently turnedon and tuned in, Sadly dropping out is no longer an option available.