There are only a handful of people in the world capable of "playing along" with the unwritten rules of the world, as well as understanding the intricacies and complexity of running such an organization.
I actually don't criticize the selection. You knew someone from inside their circle would get it. The World Bank continuing to run as it has been is good for America, even if it is some golden parachute enron guy. It's not a job designed for the pope to run.