At least 6,000 homeless addicts — many from out of state — were lured to California detox centers by “body brokers” working for a pair of accused fraudsters in a $1.6 billion rehab scheme considered the largest in history, federal prosecutors revealed. Los Angeles rehab king David Young, 71, and his son Nathan Young, 39, allegedly offered free flights, groceries and other perks as part of their substance abuse scam to traffic addicts into dozens of California rehab centers, according to Department of Justice prosecutors.