Could you not argue that a waiter making you feel cared for is part of their job? A delivery driver could be prompt, or be lazy. But more to the point, there a

Could you not argue that a waiter making you feel cared for is part of their job? A delivery driver could be prompt, or be lazy. But more to the point, there are various jobs widely known to be totally underpaid and depend on tips. For instance, you tip bartenders in the US even though all they are doing is pouring you a beer. Is it "right"? Of course not. But it's a widely accepted societal norm in many countries, and is an assumed part of that person's income.