"I am not paid for this, sorry", was his answer. In front of around 100-150 students present in that class.
Another similar experience comes from a corporate world. I asked one person who was going off to (unpaid) vacation whether he would occasionally be checking his email while being out of the office.
"No, I am not paid for this", was his answer. This person was coming back from vacation to his working place after a while.
What is my problem with that kind of answers? They had totally right - they were not paid for doing the things they were asked for, did they?
However, such answers immediately indicate that a person is doing the job only for money, he does not have an interest in you (as a student/client/co-worker) whatsoever. A person puts himself in a position of a reflective employee who is given orders and thereafter gets a carrot if he fulfils the order. No proactivity. No initiative. No dedication.
I must admit that certain degree of "you-pay-me-and-only-then-I-
P.S. I am not paid to write this blog. Hmmm...