The differences between Greece's proposal and that of its creditors are not big enough to justify failing to reach an agreement, a senior Greek government official said on Thursday. "The Greek government's proposal is comprehensive," the official said. "The differences are small, and are inconsistent with failure to reach a deal." The official added that Athens had proposed alternative measures to raise revenues to offset the impact of keeping tax breaks on islands - one of the modifications Greece made to its original proposal this week.