Agree completely with Jeff.
I am setting up India's first independent evaluation office and what we need are more impact evaluations in a cost benefit framework. I just chaired a wonderful talk at the Institute of Economic growth by Prof James Heckman who has spent his whole life in doing this kind of work on human development. For example in India we have spent over $ 40 billion on the Mahatma Gandhi Rural Employment Gurantee Program but we don't know how useful it's been and whether we could have spent the money differently to achieve the same objectives. Right on Jeff