Kenya's government, which was elected on a pledge to fight corruption, has been hit by the resignation of its chief anti-corruption official John Githongo this week. Donor countries have threatened to suspend aid if they cannot be sure that their money will be well spent. Kenya's leaders are not the only ones to find that eradicating corrupt practices is a tall order. Sceptics fear that the UK-led move to increase aid to Africa and forgive their debts will only make more money available to corrupt elites. Western governments are increasingly linking aid to good governance, and in particular to efforts...