Science fiction has its own history its own legacy of what's been done what's been superseded what's so much part of the furniture it's practically part of the fabric now what's become no more than a joke... and so on. It's just plain foolish as well as comically arrogant to ignore all this to fail to do the most basic research.
Justice requires that everyone should have enough to eat. But it also requires that everyone should contribute to the production of food.