We value the freedom of doctors and medical staff to speak with whoever they want (such as drug representatives) with some specific restrictions detailed in Saul’s article

We value the freedom of doctors and medical staff to speak with whoever they want (such as drug representatives) with some specific restrictions detailed in Saul’s article. Is there something unique about the medical industry that justifies increased regulation and disclosure? 

You might argue why the system is fair and effective in its current state (perhaps even that all regulations should be removed). Perhaps such external regulation could have unintended consequences or be a waste of resources or simply infringe on doctor’s freedom? What ethical principle justifies your position? Feel free to bring in outside examples or analogies to support your claim.