There are more social services for people that need this than there were in the 70s and volunteering appears roughly flat since then.
Meanwhile, people have been getting old, having kids, two jobs, medical conditions and so on for a little while now. A tremendous amount of America isn't even in a food delivery area unless you count McDonald's.
Eating out is a luxury. Getting that food delivered even more so. This isn't about basic needs.
>volunteering appears roughly flat since then.
>people have been getting old, having kids, two jobs, medical conditions and so on for a little while now.
well you explained the phenomenon pretty concisely.