You can motivate people to do manual labor a lot of ways, but this does not mean they will like it. Fear of death is a good motivator. "Hey, let's have fun work

You can motivate people to do manual labor a lot of ways, but this does not mean they will like it. Fear of death is a good motivator. "Hey, let's have fun working out!" is not a good motivator. On top of this, the premise is crazy. They want to have two societies: one that produces technology with non-human-generated power so the other society can use that technology to live on human-generated power.