The USA Federal system of mortgage loan gurantees has been gamed seriously, over and over since the 80s. It is a whack-a-mole for enforcement. All the parties close to the transactions have exactly the wrong incentives, most of the time. One of the defendants in a recent "pay cash to get your kid into elite school via fake sports" scandal was a mortgage broker in San Diego County. The Judge after reviewing evidence, reportedly told the man on the record "you are a thief." etc