A) used as political chaff for jockeying by power hungry politicians as distraction fodder or FUD material
B) centralized by the intelligence community of your country, or an allied country with an agreement that they'll do the work for your government that your government can't.
There are things that simply should not, nay, must not be made.
The Single Identification Number is one. We have all the tools to do it today. The only thing keeping it from happening is refusal to implement at the grassroots level.