There is no greater untruth than this. Wealth is not a constant. Wealth is created out of efforts put in by human beings. Some of this wealth is taken by rich poeple and some by poor. Middlemen make all the money in a capitalist system Middlemen cannot make ALL the money.
Middlemen make some money.
There is no need to have a heartburn about this. Some middlemen are necessary to stabilize the system, some of them are necessary for their services and some of them might even manage to exploit the system and make some money without actually contributing anything. Those cases are exceptions and do not change the fact that the quality of life under a capitalist system is better than under a socialist system. A few people who exploit the system will exist but they form only a tiny negligible fraction. Most of the economic activity is due to the efforts of people striving continuously to improve the quality of life.