So, ask the person who lost 3 billion accounts, the person who is stuck with the mess from losing 3 billion accounts, the person who lost 145 million SSNs, and the person who is stuck with the mess from losing 145 million SSNs how to protect against data breaches?
I appreciate the relevance of those individuals to data security, but they're clearly not subject matter experts. If I wanted to secure my home against burglars, burglary victims probably wouldn't be my first consultation.
That said, the mostly fixed nature of SSNs and their intrinsic potential for introspection is a huge liability and we should move away from them.
[edit: Karen Zacharia may well be a subject matter expert here, it's a little unfair to group her in with my rant.]