Helpless Homeless

Yesterday in DesMoines IA there was a man at the QT gas station with a sign that said "homeless, anything will help". He was sitting outside in -10 weather. Dressed OK but man, why. Inside was a burger king and a large place. I had compassion. Gave him 5 bucks. My wife noted that he was sitting right below a "Help Wanted" , apply inside sign. I know that in DesMoines the unemployment is very low. I wonder what his story was?