Under a true gold standard, the optimal quantity of money is determined by market forces the money supply spontaneously adjusts to the demand for money, and long-run price stability is achieved.

FORBES: The Federal Reserve's Flawed Approach To Monetary Policy

That long term solution is almost certainly, in the absence of true economic government for Europe, the ECB purchasing Italian and Spanish bonds in large quantity and simply printing the money to pay for them.

FORBES: The Euro: Solving the Crisis

Without a doubt all the factors mentioned by the bank in paragraphs 33 and 34 arguing for lower neutral rates are true, but as is well known the neutral rate, not being an observable quantity, is both hard to estimate and is constantly changing.

FORBES: Brazil Heading For U.S. Style 'Free Money'