to simplify it it is people who ussually never had money and had very bad money managing skills . just look at pro athletes that came from nothing. make millions for a few years and then are flat ass broke living in a box withing 3 to 5 years of their carerer being over. i mean look al Allen Iverson.
http://madamenoire.com/536085/broke-baller-how-nba-star-allen-iverson-lost-it-all/