of course work=money.... that's why people do it for the most part... why should we made their day any harder by not being polite?...
I didn't say we should. I said the opposite. The thing is, the reasons for being polite need to be real (it genuinely does make the world a better place, and that in itself is a good reason).
I'm not big on formalities, and sometimes it's the less friendly staff that I feel most comfortable talking to. I HATE fakeness. I have made quite a lot of small talk with people at check outs who are complaining about how boring their job is, or implying that it is boring by stating that they "only have 2 hours and 56 minutes left". I don't have a problem with it. I would go as far as to say that people being friendly and acting happy when I can tell that they are actually not, really irritates me.
Having said that, sometimes friendliness is very genuine and that's fantastic. It makes me think: should staff be told to act happy and friendly, or instead, should employers create an environment in which staff actually ARE happy and friendly? I think the importance of the latter is sometimes under estimated.
Anyway, back on topic, friendliness over rated. Genuine-ness is under rated. Say hi if you feel like it, and can do it for the right reasons.