You know who's acting like an "adult" on sovereign debt? China

That brings up another similarity between Greece and America: that the necessary may be impossible, that baby boomer politicians in the age of Twitter may not be up to addressing problems this big. The hole is too deep and power too fragmented. The only way out is by collective action — where ruling and opposition parties unite, share the pain and take the necessary steps. But that is not happening here or in Washington. There are Eric Cantors everywhere — reckless baby boomer politicians for whom no crisis is too serious to set aside political ambition and ideology.

But there is an adult lurking. China has been buying Spanish, Portuguese and Greek bonds to help stabilize these Chinese export markets. “These are delicate times, and we take a positive role,” Yi Gang, deputy governor of the People’s Bank of China, told the British newspaper The Guardian in January.

This is a role America used to play, but can no longer afford. Anyone who thinks that this economic crisis, if prolonged, won’t also hasten a global power shift has never heard of the Golden Rule: He who has the gold, sets the rules. “We are so used to the Americans providing the solutions for Europe and leading,” said Vassilis T. Karatzas, a Greek money manager. “But what happens when we are both in the same boat?”