Class and conduct

I decided finally to get out of Cairo before I left for good at the end of the month. The closest beach was at Ain El-Sokhna, so I came to spend the weekend here. As I was walking, minutes ago, by some villas overlooking the sea, I came face to face with A young gardener working on the gardens of these mostly unoccupied villas. I smiled and said good morning, but he kept his stern face and fierce gaze and didn't reply. There's no way he didn't see or hear me as we were close and looking eye to eye.

Staff in the hotel always smile back and return the greeting. For them, it is obviously a repeated game (both individually, for tips, and collectively, for repeat business). I wonder if the gardener had been working at an area where most homes are occupied. Would he have been conditioned to smile back and return the greeting? Does he do that with the owners of these resort villas when they're in town?

More importantly, are those workers who smile and return the greeting secretly resentful, and would they like to keep a stern face and fierce gaze like the gardener I've just met? When one gives a significant tip, are they genuinely happy and appreciative, or are they secretly resentful that a sum of money that one considers substantial may be insignificant to another (a tip)?

Does the same extend to those whom we help? Especially, conversely, if you help someone of a higher class unselfishly, do they resent it? About 25 years ago, my friend RS introduced me to two great economists, RR and MM. The latter two were working on a paper and wanted someone to help them solve their model numerically. I gladly helped them out, and it only took a few hours. A few months later, MM was giving a seminar at Caltech and showed me a draft paper with the authors listed as MM, RR and El-Gamal. I didn't tell him that I always follow alphabetical order, but told him what is more important: I didn't contribute a whole lot to the paper, so a "thank you" in the footnote would suffice. RR later sent me a contract to be paid as a consultant for the work that I had done on the paper. I was deeply offended at the time. I guess that I was offended that he was offended (a lowly person like me should have been delighted to get a coauthorship with him, and should have accepted it gratefully). He was obviously a great man, and I should have accepted it, just like this gardener should have smiled back and reciprocated the greeting.