In whose version of utopia is the perfect community one in which convention and coercive societal restrictions are eliminated, and replaced by a reward system that shapes people's desires to fit the community's needs?

Answer: A utopian world is a world that will never exist. So, to answer your question, it depends on who you ask. Some people may say that being governed on all of our actions throughout our day will provide a utopian version and then others will say that having everyone getting what they want will get a version of a utopian world.

But to really answer your question, the answer is:

B. F Skinner's