I think that the people who need the survival training are surburbanites who live in that 24hour-comfort-zone called suburbia!
The homeless might be a bit more savvy than you think.After all there are a lot of predators out there on the streets of our cities! It's the remote control-equipped couch-potatoes of this world who could really do with some wilderness training.I wouldn't fancy their odds of survival in the wilderness even with training! I think the homeless would have the edge in terms of being able to endure harsh conditions.
After all what would you be able to tell a homeless person about the cold,that he or she doesn't already know?