I worked as a waiter in a restaurant in the 90s when I was in high school. I was making $2.65/hr, the line cooks were making $10-12, yet I’d get shook down to tip the busboy, cook, bartender, hostess etc. If you didn’t play, you’d get slow-rolled. They wanted their vig whether or not the customers tipped well. Fuck that.

Tipping via card is even worse in many places because the manager or operator is just assigning money (or not) as they feel. Again, working spiffed retail sales, you need to track what you’re owed or mistakes will happen.