I don't think your guest realizes money is used to exchange work and it is used so that people feel that their contribution is fairly valued compared to others contributions. You can have money to barter with others without using a centrally controlled and issued dollar.
..and nothing is created for free, except imaginary things.
..and the 'elders' will have to force some of the people to 'contribute' more, or ostracize them I guess...
If the idea is to have a more free society, I think he needs to think though his philosophy more completely.