Its a wonderful concept, but always seems to fall of its own weight.
Resistance is formidable.
The culture, the structure, the operating assumptions, the laws, the political environment, the cost, and the fear of change all combine to make this an impossible task. However, I wish you the best of luck. Your intentions are admirable. To the best of my knowledge, no jurisdiction in local government has a performance measurement system that directly drives the budget. That level of knowledge is unknown in the public sector.