In a globally integrated economy, the biggest challenge is to make sure there is adequate global aggregate demand, achieved through spending, when countries like China feel they must save high levels of dollar reserves to protect against international currency volatility.

This Iraq war has been the most "privatized" war in America's history. It has seen the most extensive use of contractors. The contractors have increased the costs; but they have been necessary - the military simply could not have done it on their own. we would have had to increase the size of the military. But the George W. Bush Administration wanted America to believe that it could have a war, essentially for free, without raising taxes, without increasing the size of the armed forces.

For instance, one of the costs of the war is that soldiers today get very seriously injured but stay alive, and we can keep them alive but at an enormous price.

The country has large unfunded liabilities - social security, health care, and there will have to be some adjustments to these problems. What is scary though is how much worse things have gotten in the last eight years, and the Iraq war is one of the main factors.

The IMF is a more complicated issue. I think there is a broad sentiment among both the left and the right that the IMF may be doing more harm than good. On the right, there's the view that it represents a form of corporate welfare that is counter to the IMF's own ideology of markets. But anybody who has watched government from the inside recognizes that governments need institutions, need ways to respond to crises. If the IMF weren't there, it would probably be reinvented. So the issue is fundamentally reform.

Temporary nationalization of the banks that are in very bad shape would mean basically that the government is the temporary owner. I always believe that the government should focus on its comparative advantages, and banking is not one of them. It should, therefore, if it nationalizes banks, sell them back to the private sector.

The striking thing about America is - it's historically, extraordinary unusual, I don't of any other instance - is that productivity of workers and wages have not moved in tandem.