EBM and doing the right thing, and of being economically attractive

“Many people think that doctors make their recommendations from a basis of scientific certainty, that the facts are very clear and there’s only one way to diagnose or treat an illness,” he told the review. “In reality, that’s not always the case. Many things are a matter of conjecture, tradition, convenience, habit. In this gray area, where the facts are not clear and one has to make certain assumptions, it is unfortunately very easy to do things primarily because they are economically attractive.”

From an obituary of Arnold Relman in the NYT. The way money influences decision making is incontrovertible. How do we describe and explain this to students? And would it alter things (I fear not).