When to tip and when not to tip?

Past weekend I was at a local butcher and purchased some sausages from the display case. When they swung the iPad like terminal around for me to pay there was the screen with suggested tip amounts on it. I am not surprised anymore by it. It seems with the heavy use of credit/interac the tip prompt is becoming more normal. I have even seeming it now at a few drive thru’s.

I am very much a believer in tipping at restaurants and will always leave a 15% tip no matter the level of service or quality of food. When service is good I always tip 25% or higher so no, I am not cheap but I do think tipping is getting out of hand. I read an article recently on the growth of tipping requests and the author said he has a rule of thumb that if the purchase is because he walked in, made a purchase, and it’s handed to him in a bag then no tip should be expected.