Re: Why not re-use the PCI standards...
The fact that it's international, that other national governments are involved in regulating (or preventing regulation), that banks are not necessarily trustworthy just because they're banks, and because there is an expectation that there will be a government rescue in the event of serious situation.
The usual first reaction I've seen in the last several incidents has been to demand a US government agency compensate banks for their losses, so it's clear they're focused on political solutions rather than technical solutions.