In short, yes.
What I have focused on and tried to talk about in terms of the structural change that fosters price competition in the marketplace is what you would refer to as supply-side management. What you are referring to is what an economist would refer to as demand-side management. You want to manage the demand for pharmaceuticals—in other words, the writing out of the prescription.
Yes, there are national agencies. There is the Best Practice Advocacy Centre, run out of the University of Otago in New Zealand, which essentially does what is technically referred to as academic detailing of physicians. Fundamentally, they use their own practice and compare it with what they might consider to be comparable practices and ask them why they're out of line or what they think they might do differently, etc.
Yes, those demand-side management activities are well utilized.