Many people get upset by inequality.
However, there is equality and there is equality.
When you reward people the same way regardless of their efforts and achievements, the more talented and the harder-working lose the incentive to perform.
This is equality of outcome.
It’s a bad idea, as proven by the fall of communism.
The equality we seek should be the equality of opportunity.
For example, it was not only unjust but also inefficient for a black student in apartheid South Africa not to be able to go to better, ‘white’, universities, even if he was a better student.
People should be given equal opportunities. However, it is equally unjust and inefficient to introduce affirmative action and begin to admit students of lower quality simply because they are black or from a deprived background.
In trying to equalize outcomes, we not only misallocate talents but also penalize those who have the best talent and make the greatest efforts.