I do wish this was an option for some data, but emergency care would be an absolute shit show. People can't even remember passwords let alone keep track of keys and devices.
Hell no. The fuzz ain't getting my info without reasonable, articulable suspicion that I have committed, am committing, or am about to commit a crime, or if I'm pressing charges and need to ID for that process.
I'd rather have society deal with the problems that come with not knowing who's under the truck than the problems that come with state surveillance.