One thing that might make a big difference is that poor people generally can't afford to buy only on sale. Another is the environment they live in, a lot live in urban areas and even more don't have cars or access to transportation and conveniently located and large supermarkets.

I priced the same meal at my supermarket and it was at leat $5 more. Where are you getting the cheap ground turkey? At my market, both ground beef and turkey was $3/lb. and broccoli was $1.49/lb.

As I said, not being able to have the freedom to shop sales or the availability of reasonably priced produce might be a large factor. I know when I was growing up, fruit was an occassional treat, mostly during the summer. With a large family, you can't afford fruit when it costs more than a couple of dinners would. We were lucky if we got a bad of apples and oranges and those had to be pieced out.