3. Actually it was Hillel and he did not “come up” with anything. That is a Conservative contention. He only activated a possibility that always existed.
4. Once again, capitalism is the system of private ownership of the means of production. Regarding the definition of a free market, see the Wikipedia article, which gives two opinions. An example of socialism would be a government pizza authority – which would probably make lousy pizzas (when they are available) except, of course, for party members. As George Orwell wrote in Animal Farm everyone is equal but some are more equal (In Hebrew it is even better:
כולם שווים אבל יש ששווים יותר),
5. Onaat mammon is fraud. However, if the seller says that the market price (if there is a market price) is such and such but he charges more (or vice versa) there is no onaah.