It's an odd omission, inasmuch as agencies have deployed many more complex tools in their efforts to make government work better. What's missing is the human factor. The answer is both simple and complex.
People like to be rewarded for a job well done.
In government, precious few rewards are rendered. A handful of awards programs, including two run by Government Executive , provide non-monetary recognition. Nor is compensation linked to organizational performance. Government lags far behind the private sector in its approach to pay. The subject is simply not raised when Congress and the White House make their frequent forays into corporate management faddism.