I agree that the automatic 18% is insulting to customers, but the “Pastor” (according to the Bible, a female pastor is a possible as a male mother or a female father) shouldn’t have taken it out on the waitress.
If she objected to the 18%, she should have adjusted it to 15% or 10% or whatever she felt was earned. I actually LOVE the idea of crossing out the 18% and putting in a fair amount of one’s choice, but leaving 0 (unless the service was aggressively horrific) is not right.
Also, the “I give God 10%” comment is unbiblical because bragging about your giving is wrong (Matthew 6:1-4). Also, if she is on staff as a “pastor” she is likely receiving a good portion of the 10% (or whatever %) that the congregation is giving to the church.
Like all of it, as "pastor and sole proprietor"