I found the following talk to be incredibly thought-provoking as it relates to the gov't's efforts to increase worker productivity. This speaker shows how traditional incentives don't work as assumed to when the work requires cognitive skills and creativity. On the contrary, those incentives have the opposite results! I highly recommend this video.
Career analyst Dan Pink examines the puzzle of motivation, starting with a fact that social scientists know but most managers don't: Traditional rewards aren't always as effective as we think. Listen for illuminating stories -- and maybe, a way forward.
link - http://www.ted.com/talks/dan_pink_on_motivation.html