Are you saying you can’t use less beef when cooking at home? Or share the 2L of soda? You just used less food.
You can cook 4 burgers + fries for the family in 20 minutes. Many times quicker than driving and waiting in line at peak times. This guy does it all the time youtube.com/playlist?list=PL-tYKWQOe4YMbM7A7LELOs… (sometimes wins sometimes loses).
You need a pan, an oven, and 5 qt pot, a knife, spatula and you can basically make whatever you want. There are very very few Americans without the means to do so. www.eia.gov/todayinenergy/detail.php?id=53439. 99.5% of households have a refrigerator. According to HUD there is a homeless population of about 500k. Even if you allow for generous rounding and assume I missing some populations right there… The majority of people have every ability to make a good meal at home for cheap.