There's a trade-off between convenience and privacy. Identity verification will be a nightmare without a universal unique identifier (of which the US SSN is not

There's a trade-off between convenience and privacy. Identity verification will be a nightmare without a universal unique identifier (of which the US SSN is not because it isn't compulsory) because cross-comparing other personal info is too complex. Although I know having a unique compulsory personal identity number (as many countries in the world have done) will have these so-called "privacy advocates" in the U.S. screaming at the top of their lungs. So either deal with it or leave it.