I’m a big advocate of much strengthened financial regulation. One argument I don’t buy, however, is that we should try to shrink financial institutions down to the point where nobody is too big to fail. Basically, it’s just not possible.

The point is that finance is deeply interconnected, so that even a moderately large player can take down the system if it implodes. Remember, it was Lehman — not Citi or B of A — that brought the world to the brink.

And as far as I know, there never was a time when policymakers could have viewed the collapse of a major money center bank with equanimity.

They certainly were worried about systemic risk in 1982, when I had something of a front-row seat. There were fears that the Latin debt crisis would take down one or more money center banks — Citi, or Chase, say. And policy was shaped in part by the desire to make sure that didn’t happen. Bear in mind that this was in the days before the repeal of Glass-Steagal, before finance got so big and wild; the New Deal regulations were mostly still in place. Yet even then major banks were too big to fail.

So I think of the pursuit of a world in which everyone is small enough to fail as the pursuit of a golden age that never was. Regulate and supervise, then rescue if necessary; there’s no way to make this automatic.