There is a guaranteed way to create a society with unlimited energy where everyone is healthy. Giant human hamster wheels. Seriously, why can we not just run on giant wheels to generate kinetic energy and power our machines? You cannot get more energy output than input, but this is not a problem because the fatties will finally get healthy when running on them. I would gladly power my electrical appliances in my house with one of these, and improve my running in the process!
Yeah- but I'd draw the line at the inverted water bottle attached to my cage. I mean... squeak squeak...