Bill Gross of PIMCO, the world’s biggest bond fund tackles that one:

Question: How bad could this get?

Answer: No one knows for sure, but common sense would provide a good guess. If the government cannot substitute credit to the same extent that it is disappearing from the private system, then the U.S. and global economies will retreat. If the economy is viewed as a bathtub filled with water (credit) at two different times with two different levels, then draining it back down to the lower first level might reduce economic activity proportionately. Liquidate debt (credit) to 2003 totals and you just might reduce economic activity (GDP) to 2003 numbers as well. Whoops! That would mean a 10%+ contraction in the economy with unemployment approaching the teens. Keep that bathtub full!

Question: What can be done?

Answer: Keeping the tub sufficiently full means advancing policies in content and magnitude never contemplated since the days of FDR. The U.S. and global financial systems require credit creation and foreclosure prevention, not bank nationalization as currently contemplated by some. Trillions will be required in the U.S. alone and it is critical that there be a high degree of policy coordination among all nations, which avoids protectionist measures reflective of failed policies in the 1930s. To date, PIMCO’s Mohamed El-Erian’s imperative of “shock and awe” has been more like “don’t bother us, we’re working on it.” Get moving. Risk being bold – Washington.