'A financial crisis is surely going to happen as big or bigger than the one we had in 2008 if we continue to behave the way we're behaving," says Stanley Druckenmiller, the legendary investor and onetime fund manager for George Soros. Is this another warning from Wall Street that Congress must immediately raise the federal debt limit to prevent the end of civilization?

No—Mr. Druckenmiller has heard enough of such "clamor and hyperbole." The grave danger he sees is that politicians...