From some perspectives charging everyone the same amount is wrong. In fact I'd say my intuitive notion of what a "fair" price was was closer to that when I was

From some perspectives charging everyone the same amount is wrong. In fact I'd say my intuitive notion of what a "fair" price was was closer to that when I was young, even being American. If a shopkeeper makes little or nothing selling an apple for $.25 to poor locals but does it anyway, but then successfully charges more of people she judges richer, she is any of remarkably charitable, grossly unfair, or simply doing what's right and expected, depending on one's culture or perspective. Similarly, the mechanic who could charge more but instead charges a smaller amount at what seems to them a fair markup is either an idiot or a good citizen, depending on one's perspective.