This is true – often to the detriment of the workers. Americans – especially those Karens – expect 5-star treatment in exchange for a pittance. For example, waitstaff hourly wage is $2.13 per hour; those Karens you praised treat waitstaff like their personal servants (or slaves) and expect a 5-star service experience – then will walk away from the table without leaving a tip at all.

Even bad waitstaff deserve 15% of the ticket at a minimum.