1,000,000 people who are starving would find some slower moving members of the colony to fill their appetite. And reduce the community’s food needs.
I was going to include a comment like yours about human cannibalism but did not to let others, like you, to illustrate the extreme nature of such a colony. The horror of a colossal failure creating a starvation situation is enough to give me nightmares. It would also make a good science fiction movie.