Mr. Cahuzac said the government isn't planning any more tax increases for the next few years as it tries to offer stability to companies and taxpayers following the exit of high-profile citizens.

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"The business is more defensive than most, " says Joe Box, an analyst at KeyBanc Capital Markets in Cleveland, adding that this stability may be especially useful if politicians can't avoid the "fiscal cliff" of slated tax increases and spending cuts at year-end.

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But Opec hawks Iran, Libya, and Algeria warned in a statement that market stability is a responsibility of non-Opec as well as Opec producers, implying they might oppose the production increases.

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While the ECB fears that spending increases involved could be inflationary, politicians, executives and academics are calling for a modification of the Stability and Growth Pact, which limits eurozone countries to a maximum budget deficit equivalent to 3% of GDP.

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