It is a fact that many of the countries which suffer the most from corruption are the countries which have the fewest resources to combat the problem. Poor countries may be faced with a dilemma of using resources to prosecute the corruption which degrades the quality and quantity of public goods that reach their citizens, or using resources to provide those basic goods, such as food aid and roads.
At the same time, larger bribes are not infrequently paid by outsiders, such as foreign corporations. Casual observation shows that funds must be coming from outside some of the poorest countries. In short, the bribe money is flowing from the developed world into the developing world.