Those are good questions, but many would lie. On my second consulting project, the Senior Manager told us that if we drank coffee, we were required to make at least one pot a day. There is no faster way to make the client staff unhelpful and hostile than to be a coffee puke.
Ever hear of "at will" employment? The expectations of the company were set at this interview. No one was excused from doing what was necessary or beneficial to the company because of job description.
Obviously there are times when high level people are needed for things other than making coffee, but the principle stands.