Who really wins when your bill gets added up wrong and you don’t say anything?
I’m sure you say something if it costs more than you expected, maybe somethings been added on twice, but what about when there are missing items and it’s cheaper?
It might be a couple of deserts or it could be a few drinks so you don’t say anything and come away pleased that you saved some money.
But that money doesn’t just disappear, it’s just that someone else becomes accountable, I worked in a restaurant many years ago where mistakes like that came straight from the tip jar to correct the balance. And if you can afford to go out for dinner you can probably afford the missing balance much easier than the person serving you the food can. It’s a win-lose situation, you win the restaurant loses.
But if you point out the mistake they will be grateful and you win the feeling of knowing you’ve done something good and they win knowing they almost made mistake but it was caught. Not all of life is us against them and more win-win situations can happen if we make them happen.