Why exactly should people like the system that is the closest thing we have to unfriendly intelligence, paperclip maximizer style, and which is probably the best example in favour of the SI's beliefs? This is weird.
Also, the markets are all too closely approximated by a system of very simple agents betting on random, few ending up rich, most ending up poor, and distribution ending up very similar to reality (power law distribution). I don't see why we should like a system that would produce power law distribution on identically skilled agents.
You focus on the bad aspects of markets (they make some people rich, using some randomness) and ignore the good aspects (many people have their needs satisfied better than if they had to do everything for themselves). Maybe this is what most people do -- we take the good parts for granted and complain about the bad parts.
An analogy would be an unfriendly intelligence (powerful but not FOOMing; sometimes creating food, sometimes paperclips) that would make many people say: "intelligence is bad, we should destroy all computers, and hope that the next generations of humans have less IQ so this problem will not happen again". -- The hate makes sense, the solution does not.
The last point reminded me of speculation from the recent LessWrong article Conspiracy Theories as Agency Fictions:
Before thinking about these points and debating them I strongly recommend you read the full article.