The primacy of the SSN in American society is idiotic. It's a "secret" that you have to hand out to dozens of different organizations. I've long thought that we should phase this out by committing to publish all SSNs (and the associated info, obviously, so it's not just a list of most 9-digit numbers...) which would force all these companies to stop treating it as confidential.
The system is dumb and works poorly, but worked will enough that there was no impetus to fix it. Some people got affected by breaches, and it sucked for them, but it was always a small enough group that most people didn't care.
Now that a majority of people's "secret" info is no longer confidential, maybe they'll realize they can't rely on it anymore.
OK, the odds of this actually coming to pass are not great. But I can hope.