Willem Buiter, Citigroup's chief economist, told the House of Lords last October that Germany was "the only honest triple-A rated sovereign in the G-7." The rest enjoyed their credit grades "but for the grace of God and the ratings agencies." He was referring to France, but the admonition holds equally for the euro zone's three remaining triple-A borrowers that aren't Germany: Finland, Luxembourg and the Netherlands. With the collapse of the Dutch government's budget talks on Saturday and the likely announcement of early elections, the ratings agencies may soon have reason to stop being so obliging....