First, I apologize for hijacking this thread...
Let me back up a little. I did a little more digging, and it is true that non-physicians (in most cases) cannot employ physicians as it opens up the opportunity for interfering in the delivery of medicine. But, this does not stop hospitals or industrial firms, who are manned by non-physicians, from doing so. Apparently there are wide open loop holes to various legislation. At the same time, there are legal battles currently going on all over the country that aim to prevent physician owned-PT practices...much for the same reason (several states already prohibit it). I would be interested to hear your perspective of this Buckeye4life...the AMA's argument against this (aside from the obvious capital loss) is that they are worried that patients won't receive optimal physical therapy care without the direct supervision of a physician. The APTA's response is that, in a medically-stable patient, physical therapists are the best practitioners to determine a patient's PT plan of care.
Now, I personally know of several non-physician owned medical practices (which provide a wide range of services) that employ physicians...but, I cannot presume to know the terminology of their contract agreements...in any case, these arrangements do exists...MONEY and OPPORTUNITY pay.
Also, general business principles DO apply to engineering, law, etc. firms...do your own google search for examples...