The way governments around the world has organized their Master Data Management (MDM) is quite different. When it comes to registering citizens, the practice varies a lot as described in the post Citizen Master Data Management.
I have lived most of my years in Denmark where our national ID is unique and used for everything by public agencies and also a lot by private companies. Some years ago I lived in the United Kingdom, where the public agencies (and my bank) had no clue about who I were, when I came, what I did and when I left.
Recently the World Economic Forum has circulated some videos on LinkedIn telling about how stuff is done differently around the world. The video below is about the Danish civil registry (which by the way is similar in other Scandinavian countries):
What do you think? Would this public MDM and data quality practice work in USA, UK, Germany or where else you live?