BTW. If you explore the "Why?", "Why would they do this?"
Power. Control. Because they now can. Because the technology allows it and almost requires it.
I grew up in the 80s. In my teens I had a running conspriacy theory about the government, no, I called "The system", watching everything you did, credit cards, phones, mail, etc. This was pre-internet for me.
Of course when I grew up a bit and studied computers I quickly learnt that the processing power just did not exist to start coorelating data across all these billions of records. It just just didn't. "The system" was not watching you because they system didn't have enough power or compute to.
In the 2000s I did hold to the "coorelation" issue. All those little bits of information and associations you leave lying around the internet, could, technically be coorelated and aggregated into a profile. Whether it is accurate or not is another matter.
However. Again people rightly pointed out that that power does not exist yet either. Marketers are maybe able to aggregate a couple of close datasets but the effort is high, so the cost is high. If they can sell without doing it, they wont bother.
Now in 2025+ they very much do have that power and that compute and they have the technology in AI that can do that mass coorelation and at minimal human effort too.
This fact alone immediately REQUIRES that governments capitalise on it as quickly as possible. The AI investments we see DEMAND it and are in fact exactly why that level of investment exists and even the banks are holding the risks happily. If it proceeds the banks obligation to do "KYC" gets released from them and all the costs associated with it. Instead it becomes "Know your citizen" and when the bank wants to vett someone is "sound" they just make a GovID API call. If the government say they are sound, they are sound, transaction approved. If the government say that "No, Joe Blogs smell funny", then "Transaction denied", even if it was for a loaf of bread or a tank of gas. Even if the system is completely wrong.
And having such a system that can scan and coorelate millions of individuals across hundreds of datasets and build profiles and answer queries on individuals. Is completely useless unless you have one very key bit of information. A "primary key" for the individual. If you can coorelate all of that together and then pin it onto a single person legally, then it will actually give you the control you want. Therefore. Digital ID is a prereq for all of this and it's why they are pushing it through teh front door, back door and every f'ing window right now.
The weapon we can use against it is to "taint the data". Enough bogus and "looks right" information that is actually made up, deliberately obsfucating or just fabricated will eventually make the whole thing unusable.
.. or I've always been a little paranoid.