>what do you expect in a free market system that rewards every marginal advantage other than wealth to flow from less sophisticated people to more sophisticated ones? ...

>Why are we surprised that they disproportionately get the better end of every transaction?

Because normally, competition in the marketplace thins out such "easy" profit margins, and something is keeping that normal process from happening here. After all, you don't see such exploitation of the unsophisticated in, say, sale of breakfast cereal, where excessive profit margins draw in competitors.