Who said anything about REALID solving the national ID problem? We need to replace SSNs with a modern identity system.
https://www.ssa.gov/fraud/#:~:text=How%20to%20report%20fraud....
This was a genuine question. It's not obvious to me why it would matter which primary key people used in their customer databases, but fraud is also not something I worry about or really even think about.
Currently your SSN is your client secret, but it’s a terrible one and we should replace it with a more robust secret. I shouldn’t be able to steal your identity by knowing a short number with minimal entropy.