The nature of the problem you are describing (private companies having a more reliable unique ID to correlate data than phone number) seems incrementally worse than what we have today. In practice, most people rarely, if ever, change their phone number. I don't like that companies demand my phone number to get cheaper groceries, but in practice I just type in "(local area code) 867-5309" [1] into whatever terminal is asking for my phone number and get the discount 100% of the time.
The consequences of the problem the proposal is trying to address seem larger to me. Currently, you can be denied access to capital and even basic financial services because identity management has been outsourced to unreliable third parties with no incentive to do a better job.
Yes, I agree it is incrementally worse. I agree that de facto, the surveillance industry is practically inescapable. The technical ability to avoid various forms of tracking requires an extreme amount of effort and unreasonableness. I myself will put in such unreasonable effort on many things, but I still cannot manage to do so for everything.
Still, there is a difference between this de facto state of affairs, and a de jure mandate from the government to make us more trackable.
If were talking about the deficiencies causing the original topic, the right answer is to rebuke this nonsensical concept of "identity theft" and make companies fully liable for their attempted frauds (ala the top level comment of this tree). If we're talking about constructively building systems to do things the "right way", then privacy needs to be incorporated in such systems from the ground up, as the previous bait and switch with social security numbers has demonstrated.
The consequences of the problem the proposal is trying to address seem larger to me. Currently, you can be denied access to capital and even basic financial services because identity management has been outsourced to unreliable third parties with no incentive to do a better job.
[1] Sorry Jenny https://youtu.be/6WTdTwcmxyo