I've heard of the instances where people weren't allowed veggie gardens in their yards. Iir it was all about landscaping rules to keep things looking uniforms and tidy (gardens can get wild and crazy). These local ordinances have nothing to do with food equality distribution problems. Nor are individual front yard gardens really the answer.
We simply have to have the will to make fresh food available to the masses.
That said, community supported farming is big in these parts. Urbanites can buy into a share of a farmers crop - as various fruits and veggies are harvested throughout the season the share-holder is given their allotment. Typically, it's a weekly drop during the growing season.
Better news is SNAP dollars can now be used at farmers markets and farm-stands.