Restaurant Owners, do you condone servers getting pissed about regulars who don't tip to their expectations?

Let's say hypothetical, you have a core of regular customers, they visit at least twice a week and spent a good amount of money in your restaurant. The kicker is they tip a flat $5 each time, your servers hate it and start to treat them to a lesser standard. What would you do if the customers told you they were not prepared to tip more and were going elsewhere if things didn't change? You stand to lose let's say $1500 per week revenue, and will receive a slurry of poor reviews.