I think that it is remarkable that so many people put so much emotional effort into this subject. Whether or not one should tip, and just how much this should be, seems to be the source of almost never ending debate, and sometimes vitriol. One would have thought the comments would have been...'I give so much in this situation'...' In Australia, we usually give so much'.... 'We never tip in Patagonia'... and so on. Some people seem to base their philosophy of life on tipping practise. Curious.