People need work to keep them occupied. It's built in to our psychology by evolution. We know that idle people cause most of the problems in society. So I do think there is a need for everyone to work to make the whole thing "go", if by "go" you mean have a peaceful, civilized way of living.
This sounds teleological. I can find plenty of things to do, many probably more personally fulfilling as well as societally beneficial, than flipping burgers would be.
