It’s no secret that Wolfgang Schaeuble has a dim view of how the ECB has conducted monetary policy. For years he has been sending out warnings about Mario Draghi’s cocktail of low interest rates, bond purchases and generous liquidity for banks. Euro zone inflation may be in negative territory, but for Schaeuble, the ECB’s extraordinary measures are unjustified. He has said repeatedly that they risk creating new financial bubbles. Still, until the past few days, Schaeuble’s criticisms were mostly polite and indirect. Now, suddenly, the gloves appear to be off.