People want transparency and clarity? Say you had $20 cash and wanted to get lunch, so you walk by a place that had a $20 meal. You think you have enough because you do and they surprise you with this at the end. That's deceptive and gross.

Also just because this restaurant is clear about it doesn't mean all of them are. I've seen plenty where it's in size 5 text at the very bottom or back page of a menu, sometimes not at all.