Well in the US most bartenders (even the ones I have met from LA and NY don't come close to that 600 to 800 range. Hell, only the high class strippers average that (Memphis used to have a nation wide renowned strip club and I knew quite a few of the dancers). Not all the strippers, just the high class one. My point being you are grossly distorting what the average person makes, when the discussion is about what an average tip should be.