What Christians may not realize is that, by tipping servers poorly, they are in danger of living inconsistently with the Gospel they preach. Indeed, poor tips are an example of what Moses teaches in Deuteronomy 25 -- muzzling an ox when it is treading out grain (Deuteronomy 25:4). It relinquishes responsibility to the Great Commission, because the Gospel is about grace. Of all the people in the world, Christians should understand that they are unworthy to be recipients of the great mercy, grace and generosity shown them in Christ. Even an unbelieving person can tip fairly, but Christians should be more than "fair" tippers, they should be generous because God has generously provided redemption for them through His Son, Jesus Christ (Luke 7:47). For the Christian, tipping shouldn't be contingent upon the dining experience.Read the rest.
When a Christian determines the tip percentage of the bill based on quality of service or uniqueness of the dining experience, he or she contradicts grace and flirts dangerously with greed. It is flirting with greed because it forgets, at least momentarily, that underserved grace is shown to us every day.
(HT: Owen Strachan)