The financial system has reached the point of maximum peril. After years of profligacy, banks have all but stopped lending to each other as the US Congress decides whether to extend support. If the unravelling of the banking system continues, the economic consequences will be dire. Yet there is an even greater risk: that the politicians now contemplating Wall Street’s follies draw the wrong conclusions and take the wrong decisions, losing their confidence in markets altogether.

It would not be the first time. After the Wall Street Crash, markets were deemed to have failed and US lawmakers attempted to regulate short-cuts through the crisis. The widely-copied Smoot-Hawley Tariff Act quadrupled the effective tax rate on thousands of imports and deepened the “Great Contraction” of 1929 to 1933. The price of popular anti-market sentiment was much higher in some of Europe’s fledgling democracies: fascism.