Unless performance has a single clear measurement business has a poor record with targeting performance pay.
In fact higher pay to top management and higher performance pay, in British research, correlates with the worst performing companies.
Production. Was it the manager or the staff?
Sales. Was it better training, better support, better product or sales team performance.
If performance pay is such a good idea how about tying MP's pay to the average wage. 5 times the median wage with an 85% tax abatement rate on any other income would seem about right.