EdgeCapper, I'm not trying to say anything bad against you, I'm just saying dealer's shouldn't be assholes to people who don't tip. They don't have to tip, but it's still your job to work for them since that's what you're getting paid for.
I used to be a waiter at a restaurant. It was rare, but sometimes people didn't tip at all. I could have chased them down into the parking lot and told them how I can't afford to live off of 4.50/hour, but that would just be rude. I've had several dealers complain out loud purposely for me to hear how they can't live off of 3.50 per hour. Well, I really don't care to hear it while I'm playing. I have the option to tip or not tip, just do your job and leave me alone.
So I've worked in a position depending on tips. Once I noticed they didn't tip, I don't give them attitude and stop serving them. I keep doing my job, because that's what i'm supposed to do. I just live with the fact they don't tip (for whatever reason) and move on. I could be a complete ass to them and give them bad service for the remainder of their stay, but what's the point?
To put this into a dealer's perspective. If one player isn't tipping, why only deal 40% and be a jerk to them? Doing that doesn't help you in any way, so it won't make up for the player not tipping. Why don't you just keep working like you're supposed to and get over it?