Nope.
I still don't know how to express this in something other than theory, but her I go...
If they take the Hippocratic I will acknowledge their oath as well so cheap service tips are out of the question.
That said, I'd risk my life to save theirs, or at least bake them a pie if it was necessary.
What I give them in return, me being broke and all, is the most valuable thing I think I can give them: my trust.