Marxism, the religion of the malcontents.
This might have been true in some past societies and perhaps in some today, but it is not true in Western Civilization where achievement and merit or the lack thereof produce upward and downward mobility.
Not only is their ideology based on false assumptions, but it attracts predators and oppressors who prey on achievers, intentionally using the false assumptions as an excuse for nefarious designs, laziness, lack of intelligence, or other reasons for non-achievement or as an excuse merely to confiscate--to steal--the rewards of the labors of the achievers.
Marxism basic idea is to punish the rich, regardless if it is economically good or bad.
Marxist ideal is for all to be equally poor, and punish all those who benefited unjustly from exploiting the poor.
Enriching oneself is the greatest sin in Marx religion!