Ninja - "the traffic they get paid to shift" is a phrase that seems a little inappropriate since they are actually paid to control the airspace in which they operate and are required so to do. If for example there is any case where vfr traffic is seen to be excluded unneccesarily then they can and are called to account to explain why. CAS is granted on the basis of equal access but of course the controller must decide on priorities. If a block of CAS is underused (not the case here of course) because there are insufficient controllers rather than airspace saturation then the controlling authority can be required to employ more controllers. No I am not an expert nor a controller so I asked the appropriate authority for a definitive answer.
happy flying!