Internal Audit's Annual Performance Evaluation

I was wondering what the consensus in the world of I/A is to the following issue:

CU management is changing the structure of annual performance evaluations to include a component which consists of 5 common CU financial goals.  Internal Audit's level within the organization will have approx 20% of its annual appraisal tied to how well the CU does in these 5 metrics.  The other 80% will be rated on I/A specific performance objectives.  Any thoughts on if this is common in our industry and how this might affect I/A's independence?   Thank you in advance for your feedback!