PARIS (Reuters) - The CEO of a U.S. tire company has delivered a crushing summary of how some outsiders view France's work ethic in a letter saying he would have to be stupid to take over a factory whose staff only put in three hours work a day. Titan International's Maurice "Morry" Taylor, who goes by "The Grizz" for his bear-like no-nonsense style, told France's left-wing industry minister in a letter published by Paris media that he had no interest in buying a doomed plant. "The French workforce gets paid high wages but works only three hours. They get one...