Mr White said central banks have been put in an invidious position, compelled to respond to a deep economic disorder that is beyond their power. The latest victim is the Swiss National Bank, which was effectively crushed last week by greater global forces as it tried to repel safe-haven flows into the franc. The SNB was damned whatever it tried to do. "The only choice they had was to take a blow to the left cheek, or to the right cheek," he said.