We cannot all be equally rich - because the earning and spending tendency of people tends to vary. Even if we had a point where everybody starts with the same amount of wealth, inequalities will appear over a period of time. Some people will earn more because they are capable and entrepreneurial - you cannot fault them.
Correct, it seems that some people want to achieve some level of uniformity between all people when it comes to their income level or even their wealth but that is simply impossible, what we need to try to achieve is that those that have the least can have a decent life with their incomes and have the chance to eventually get wealthier with hard work and education.