Playing to the referee does not always require such subterfuge.

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Keynesian boondoggles are acceptable in principle, they say, but they cite Japan in the 1990s as proof that such spending does not always stimulate the economy: better to boost businesses' cashflow by easing their tax burden.

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It is a delicate balancing act which does not always work - often because of other factors such as staff shortages, he added.

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He also asserts that the ultimate safeguard in entering into such negotiations is that the United States can always say no if it does not get what it wants.

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It does many things well, such as elastic scaling, but there are always those use cases where applications and data are better off on traditional platforms.

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Nor does he accept that reform-minded governments always lose elections, citing counter-examples such as Britain.

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But, and here is the limit to such blue-sky optimism, this does not mean that it will be: solvable problems are not always solved.

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