Earlier quoted context omitted.
The horse is out of the barn. We need to make the data itself worthless. There's no getting it back.
How would we go about making the data worthless?
My initial thought was "good luck with that", but maybe, in an ironic sort of way, these breaches are going to force that to happen.
"You say someone opened a credit card in my name, and you want me to pay for what they charged? What data did they use to open the account? Um, yeah, have you heard about the Experian breach? So you know that the entire internet has that data about me? Yeah, good luck collecting, suckers."
If that holds up in court (at not too great expense for the party being sued to pay the debt that isn't theirs), then financial institutions (all of them) are going to learn very quickly not to rely on that information for anything.