So I was having a conversation about living as a poor person and food obviously comes up there. I found it hard for I know a fair bit about wild foods, though not actually as much as some (I don't know all my mushrooms and berries for one)... suffice it to say at this point in the year I am bored of apples, crab apples, plums, sugarplums, sloes and blackberries, tend not to bother to pick the wild garlic unless I specifically want it for a dish, same for rosehips, same for elderberries and have not contemplated nettle soup or anything like that for a decade or more (though technically that is more of a spring thing). You can probably add walnuts and hazelnuts in a month or so when they ripen around here (don't much care for wet walnuts in general), sadly not many beech trees around here. Hunting wise the dog enjoys catching rabbits from time to time and someone gave us a brace of pheasants a while back but it does not factor at all in this. I can pull such a thing off wherever I have been in the UK as well (town* or country).
Related to that though is the subject of cooking literacy as it were. If/when I am poor and have to adjust my diet it tends to mean I just prepare more from scratch as a matter of course rather than preference. However many of those that genuinely seem to struggle with funds such that food is an issue (I see some places call it food poor) simultaneously seem unable to cook all that well. One then wonders if it is not related -- buying processed crap is both not very tasty, probably not very good for you and definitely a sure fire way to go broke in a hurry if you don't have much to begin with.
There are some that claim their cooking skills are somewhere around "I would burn cereal" and thus look on in awe if someone can read the back of a packet, note the time differences and put things in accordingly before coming back to do some frozen peas on the hob such that it is all done at once. The thought of making pastry, dough or something similar is then right out, and rolling out some premade pastry might even still be a stretch. It need not go even as far as being able to figure out what to make with leftovers and odd bits in cupboards and fridges, never mind understanding flavours and relative proportions, substitutions and whatever else you see some go in for (mind you very useful skills those).
*might have struggled in the City of London (a small part in the middle of London... usual line of complex historical reasons) but if you can afford to live there then it is probably not a concern. Anywhere normal people live in London I have found tasty edible things growing near enough, and with a bit of effort and a £3 tube ride then definitely.
Not sure what questions are particularly relevant here, even the title of the thread was pushing it a bit, but your thoughts and observations on the matter would be what is sought here.