You might be interested to know that your physician does not operate under a fiduciary standard either. If a surgeon's business were run as Mr Hudson's the only way to be sure he does not profit by performing an unnecessary operation would be to pay him an annual fee whether he performs an operation or not. Unfortunately this creates a lack of incentive for the surgeon to perform any surgery as the pay is the same, and further creates a new incentive for the surgeon to spend more time looking for new patients that pay the annual fee. 
A professional by definition is required to put a client's interest before his or her own interest and there is no perfect incentive to assure you are getting anyone's best efforts.