How Europe allowed this to happen will no doubt be the subject of many enquiries. Suffice to say that it was an intellectual failure by everybody: lenders, economists, regulators and the European Central Bank. The ECB misread the implications of the global capital surplus in the middle of the last decade (like the Fed) and gunned the M3 money supply at double-digit rates (like the Fed).
This great error further juiced the fatal flood of lending from North Europe to Club Med. Interestingly, it is what US lending did to Germany in the late 1920s. When the music stopped — when Wall Street cut off loans, as Germany has now cut off loans to Spain — trouble ensured within two years. Weimar limped on, but not for long.