Economists dominate international development, and, in the case of the World Bank, well, that is an instance of full spectrum dominance. In an article in Public Choice (2010) 142:1-8, titled 'Persuasion, slack, and traps: how can economists change the world?', Bryan Caplan has some bad news as well as some good news.
The bad news is a restatement of the argument of his The Myth of the Rational Voter (Caplan 2007): "I argue that economically inefficient policies survive by popular demand. The public systematically misunderstands economics - and probably many other policy relevant subjects - leading voters to support policies contrary to their best interests. I also maintain that the public's misconceptions are, in a sense, wilful. Most people embrace political and economic beliefs on the basis of their emotional appeal, not dispassionate analysis."