There was a line in 28 Days Later that got me to thinking. Its after the group leaves the city and finds their way to the house controlled by the soldiers. The commanding officer takes Jim (played by Cillian Murphy) into a courtyard where an infected soldier is chained up.
The commanding officer tells the Jim that the infected soldier provides a lot of information. Jim says something along the lines of “what does he tell you?” The commanding officer explains that the infected solider will never raise crops, he will never raise livestock, he will never bake bread, he has no future. And eventually, he will tell me how long the infected take to starve to death.”
This brings up the question, post SHTF, how many people will “have no future”?