[arn]

"[Doctors] get paid more w/ every test/procedure."

This is not generally true. As a physician, I don't get paid any more if I send people to get labs, XRays, MRIs, or any random expensive test.

The exceptions to this are if as a small business owner, I happen to also own the X-Ray machine, or lab. Or, if you personally perform a procedure (like a surgeon), then the procedure does get you paid more, but you generally get referred to the surgeon when you have a problem.

I agree the other incentives do exist though. "Cover your ass" and "patient demands". But those are an issue with malpractice liability and patient education perhaps.