Is this from a college or high school ethics class? If not, it could be used for one.
In my city, people can receive free meals three times a day seven days a week, if they need them, under our current Mayor. Not all cities have such services, but stealing pizza from a driver that may be training in self defense is not wise. Pizza delivery can be pretty competitive, drivers slashing one another's tires (frequently here), etc. They get robbed and take precautions, Some drivers learn self defense, some carry tasers, some carry ball bats.
This country has 4.8 Million jobs open right now today on July 12, 2012 - not enough for all, but a 23-year-old should put out some effort toward applying. If he needs help, the county jobs office under WIA offers dedicated job search and placement for people up to 24 years old. They will help with Food Stamp applications and food bank connections (I know some are out of food).
The 16 year old should be doing errands, mowing lawns, getting into a Summer Jobs Program, using the Free Lunch Summer Program for youth in every county in the US, asking for help at churches, etc. Collecting cans will feed that one - One college student here worked through a whole year of college just collecting cans for redemption.
The 16- and 23-year-olds are adults when it comes to federal work guidelines. They can get help.