I wrote to my senator about this solution weeks ago and have yet to receive an actual reply. I think the problem is figuring out the transition from SSN's to s

I wrote to my senator about this solution weeks ago and have yet to receive an actual reply. I think the problem is figuring out the transition from SSN's to something like key pairs/TOTP. How do we securely establish the "new" identity and pair it to the old SSN? Do we even bother and just start from scratch?