When I was younger, I worked as a counselor and a waiter (not at the same time), and I remember what it was like.
You bet we tip.
The appropriate amount is not intuitive (at least to me), so I appreciate and follow the suggested amounts.
When I worked as a waiter / counselor, sometimes a person simply coundn’t afford the recommended tip, or any tip. In that case, I had no taina.
It was disappointing, but what could I do.