In truth, in the fairy-tale version of bailing out Lehman, the next domino, A.I.G., would have fallen even harder. If the politics of bailing out Lehman were bad, the politics of bailing out A.I.G. would have been worse. And the systemic risk that a failure of A.I.G. posed was orders of magnitude greater than Lehman's collapse.

The moment a large investor doesn't believe a government will pay back its debt when it says it will, a crisis of confidence could develop. Investors have scant patience for the years of good governance - politically fraught fiscal restructuring, austerity and debt rescheduling - it takes to defuse a sovereign-debt crisis.

Unfortunately, I think it's very difficult to separate policy from politics. In a perfect world, in some instances, you probably would want to. In other instances, you'd probably say that the political element is important because it should, in a perfect world, match what the stakeholders need or want, or what the public is after.

In truth, a leader should either apologize, mean it and do something about it - or not apologize at all.

I have always looked at the world through the prism of money to some degree. If you could follow the money, it explains a lot of things, in all sorts of aspects of the world. You can look at politics through the prism of money. You can look at art through the prism of money. You can look at sports through the prism of money.