Fresh fruits and veggies can be expensive or inexpensive. For example, today my husband brought home 8 ears of corn for $1. Yum! Yes, I know corn isn't exactly a veggie, but tomatoes, cucumbers and other fresh vegetables are also super cheap at this time of year . . . And if you're smart enough to freeze or can a bunch, you can save big. On the other hand, if you buy individual Honey Crisp apples or Pluots, you're going to pay more than the cost of canned fruit.
Another reason fresh, healthy foods are considered xpensive is that they have a short lifespan (strawberries, for example, are fresh for about 15 minutes) . . . And I think we'll all agree that the most expensive food of all is the food that never gets eaten and is thrown into the trash.
Frozen and canned fruits and veggies are almost always cheaper, and they last a long time -- and simple, unseasoned frozen / no salt canned are equal to fresh in nutrition . . . Though they don't taste as good.
Bone in thighs are probably the best bang for the buck when it comes to meat, but I don't like them for everything.
As for feeding the poor, I think a great deal of this is attitude and willingness. When I was a kid and we were poor, we ate everything put in front of us, grew and preserved veggies, etc. but my mom taught us that. In contrast, I see a cousin of mine who works only sporadically. The day he gets paid, they go eat the buffet at Golden Corral or Ryan's (and steal fried chicken and as many rolls as they can). After that splurge, they eat fast food 'til the paycheck's gone. When the money's gone, they show up at relatives' houses at dinner time or they just don't eat. Many family members have offered to help his wife (who has a perfectly good kitchen, though probably not a full compliment of cookware and who doesn't work) how to prepare simple, cheap foods like pintos and cornbread, but she refuses, saying that they really only like fast food, cooking is just too hard, and other excuses. She will occasionally warm up frozen chicken pot pies or give the kids a boc of crackers. Apparently they're okay with being hungry half the week 'cause they do it over and over and over. Oh, and they have two children -- you won't be surprised to hear that Social Services is involved with this family.