As regards the dispersion of real GDP growth rates across euro area countries, they are comparable to the equivalent dispersion between the states of the U.S. On employment, the euro area made significant progress as well, with overall employment increasing by 14 million during the first twelve years, compared with a  2  BIS central bankers’ speeches  rise in employment of about 8 million in the United States.
To cut a long story short: such an approach is completely unsuitable as a solution of these problems. Besides, the price to pay would be far too high, namely the loss of credibility of monetary policy as the precondition for price stability.