Food and Liquor is more than just an album title, it is a metaphor. The “Food” represents the good because of the nourishment. Food is a necessity for survival however, liquor is not a necessity at all and will only cause you pain.
Lupe is demonstrating that where he grew up (Westside, Chicago), he was surrounded by tons of liquor stores but at the same time, grocery stores as well.
Suggestions
The people of the city are no longer the good people the hero once swore to protect when he arrived, they may no longer deserve protection.