Fair or unfair?

Sometimes when we talk about this topic, it is very subjective...many people will say it is depends on how you think, and how important that thing is.

Examples: If you work very hard and your salary is low and you only afford to buy a local car for yourself, but your friend who was born under a rich family, he do not need to work very hard, but then his father bought him a BMW. So, is it fair? I would say yes, you have a rich father, so it's fair for you to get a BMW. But some people also might think it is unfair, why he have a rich father but I don't? I am a good person... I treat everybody well... I deserved to be rich... blah blah blah....

So what do you think? Is it fair or unfair?