You guys are entitled to your opinion and I'm no "tip nazi", but you are both cheap bastards. The dealer's income has nothing to do with whether the house drops a dollar for the jackpot or not. You have to be prepared to tip if you win a $600 jackpot. I think $50 may be the upper limit of reasonableness but <$20 is just plain cheap. I don't play in a casino to grind out every last dollar - I'd play online if all I cared about was money made. It's one of the "costs" of playing live.
$2? I'm stunned. And again, I'm not on a high horse here, I'm also not in the service industry, but that just blows my mind. Are you guys kiddding?