A court system that works perfectly still won't be of any help to get you fed when food isn't grown and made available to the civil servants in the first place.
There's a tendency in political philosophy (and economics) to imagine up some kind implicit or explicit of ordering of events that progress from one point or another, the ordering of which is then used to assert something about justice or the "correct" ordering or way of running of society, though on closer inspection certain of the conditions in the progression (often the earlier ones) never actually existed or did so so ephemerally such that they're not really worth worrying about, or even that all the steps kind-of happened but all at the same time or in a different or chaotically mixed-up order. It's encountered all over the place and big names do it all the time—Locke's Natural Law? Yep, built on exactly that kind of dubious base. It's everywhere in political philosophy and such orderings-as-a-foundation-for-further-reasoning or guidance aren't necessarily wrong or useless, but they're often a sign you've wandered into some weak and/or misleading reasoning.
I have a feeling this is one of those. I'm not sure "society producing some food, but unable to produce any justice until they produce a little more food" is really a thing. Humans were decent at food fairly early, and some version of justice seems absolutely central to the functioning of human communities, so I'm not inclined to believe some kind of leveling-up from "food production" to "justice" is a real thing that ever, meaningfully, happened, and if it's not something that actually happens or has happened it's worth calling into question whether that "hierarchy of needs" is real or whether reality's sufficiently more complex (or even inverted—it may be more that you need some amount of justice to have a society of humans producing food in the first place, even if they're all on the verge of starvation at the "start", whatever that even is) that such a model isn't even useful as any kind of abstract, general guide (which I suspect is the case)
