Food choices are highly personal. It’s probably the single most variable expense item here. Who are you to decide for someone else whether their food is reasonable enough or not. And furthermore, in general Americans are among the least picky about their foods; now ask a Frenchman or a Chinese about their food culture.
Well I’m not the one to decide. That’s why we let individuals allocate money for themselves so they can prioritize what they care about from their resource pool.
Because preferences for food, housing, and healthcare are essentially unbounded, I think you will always have unmet preferences.