They don't want uniform ratings. They can either show "average rating 4.7" for a driver (assuming everybody is rating 4 or 5 because they don't want the driver

They don't want uniform ratings. They can either show "average rating 4.7" for a driver (assuming everybody is rating 4 or 5 because they don't want the driver to be fired), or "approval rating 70%". 4.7 of course sounds better.