Have you ever tried being deliberately unfair?
It is terribly hard.
First, you would have to determine what is fair.
What is fair for you might be far from fair towards others.
That means you have to define fairness new in every new situation.
And for every new party you want to be unfair towards.
Only if you know exactly what is fair for someone,
you can be really unfair towards him.
(translated by EG)