Why can’t income inequality be eliminated?

In a market economy, income inequality cannot be eliminated. It is very easy to explain it here. The fact is that a person’s income directly depends on his abilities. Someone knows more, can do more, achieve better results, this leads to the fact that he gets more money. Another example is the fact that someone puts in more effort, spends more time, and also gets much more money. So income is always proportional to a person’s ability, which is why there will always be income inequality.