From my perspective, the CVS tasks do identify the company's written program. When the CVS task goes out, it is from a CVS manual that identifies what the inspector is to look for. For uniform delivery of the inspection system, if they're doing what they said they did because of the plant profile, then the scientific evidence should be there.
For argument's sake, if they cook a roast beef, then they have the scientific evidence and they have the thermographs that they're cooking it to the proper internal temperature. When the inspector does his CVS task and reviews all those records, that's enough science-based evidence to show that they are indeed meeting the internal temperature to kill organisms. The inspector doesn't need to be on the floor all the time too see every cooked batch that comes out.
The question that remains is that we can't properly deliver to 100% efficiency with the resources we have.