[dredmorbius]

I'm thinking of the number of government-level identifiers which might be needed / used:

* Tax authority (TIN).

* Pensions system (e.g., SSN)

* Possibly a voting ID, though that's fraught.

* Military or national service ID.

* State tax ID.

* Drivers registration.

* Real estate / property ID.

* Medical records ID.

* Social benefits ID.

* Other registrations, e.g., weapons, broadcast licenses, etc.