For all his successes and obvious talents, I would submit that Soros does not understand on a philosophical level what capitalism really is. Soros is essentially correct. Capitalism, as stated above, is a free exchange, not only of goods and services, but of philosophies as well. Just as a temporal marketplace deals in products, a philosophy must gain currency in the marketplace of the minds. The only moral way for a philosophy to be freely exchanged is with reason.
Capitalism is a moral system that depends on free exchange.
Anyone is allowed to hold whatever beliefs they wish, but those beliefs will be tested by reality. If they do not hold up to reason, then a rational person will re-think those beliefs. Capitalism too depends on reason. That which cannot be rationally explained in a free market cannot be sustained. Capitalism serves no common good for society.