I know it's customary in the US to tip their server, but why?? Don't get me wrong, I follow the custom when I go out. However it does merit asking why is it "expected" that you pay someone extra for simply doing their job? There's nothing wrong with tipping someone if you feel they provided really good service, but why is it an issue if someone does'nt tip? If anyone should be tipped I would think it would be the police or the military. Anyone who puts their life at risk for the safety of others would merit special consideration, refilling my glass of water does'nt really seem all that special. Don't get me wrong, I'm not saying that people in the service industry do not work hard (I work in the service industry as well), I just don't see why bring drinks/food to a table while smiling means you automatically deserve extra money.