They should incentivize efficiency. In government, it would be citizen impact per employee. If you have more, you make more money, if you have less, you make less.
Do you think it would actually possible to quantify this in a way that:
1. Accurately represented "reality"?
2. Couldn't/wouldn't be gamed?
Seems challenging to me.
Choosing metrics to represent practical value, rather than let them be decided by profit-seekers, that's the real trick.
1) How many people are affected by the work of this agency
2) How quickly are peoples' needs handled on average
3) How pleased are people with the work of this agency
I think you could trivially measure each of those.