Central bank cavalry can no longer save the world: Group of Thirty

``A report by the Group of Thirty, an international body led by former European Central Bank chief Jean-Claude Trichet, warned on Saturday that zero rates and money printing were not sufficient to revive economic growth and risked becoming semi-permanent measures.'' -- Right; zero rates are to keep the financial economy from imploding (an insight that seems to quietly undergird the IMF's panicked exhortations; see a couple posts ago...)