Reuters:
Greece needs creditors to take a haircut of 40 percent and swap the remainder of its debt for some form of jointly-issued euro zone bonds as part of an overall package encompassing other struggling states, a German government advisor said.
"One needs a comprehensive concept that decides just how much debt states like Greece, Ireland, Portugal, Spain and Italy can sustainably bear," said Peter Bofinger, an economist who sits on a five-person advisory panel known as the "wisemen".
"That requires an enormous effort, but it is necessary," he added, speaking to journalists in Hamburg on Wednesday evening.