It would be a “moral disaster” if the United States were to default on its debts and become unable to pay its obligations, Jamie Dimon said at an appearance in Colorado Thursday evening. The U.S. is the financial linchpin of the world, and the economic effects of the U.S. defaulting could be “potentially catastrophic,” he said at a dinner for the University of Colorado Denver Business School. “It will dwarf Lehman,” Dimon said. [HP]