US policymakers were applauded for about 12 hours for their willingness to let Lehman go bankrupt. The adverse consequences of the shattering effect that had on confidence are still being felt now. The European Central Bank is right in its concern that punishing creditors for the sake of teaching lessons or building political support is reckless in a system that depends on confidence.
There must be a clear commitment that, whatever else happens, no big financial institution in any country will be allowed to fail. The most serious financial breakdowns – in Indonesia in 1997, Russia in 1998, and the US in 2008 – came when authorities allowed doubt over the basic functioning of the financial system. This responsibility should rest with the ECB, with the requisite political support.
~Larry Summers, former US Treasury Secretary and former Director of the National Economic Council, "How to Save the Eurozone", Financial Times, July 18, 2011