Just one remark: the payday loan industry is rife with lenders and collectors who should be jailed for the tactics they use, including routinely threatening people with jail for defaulting on their payday loans and setting them up so that technically some of them are forced to break their state's bad check laws.
That doesn't justify what the FDIC is doing, but it does mean that payday lenders need to be seriously investigated and there may need to be some further federal regulation since many of these entities are virtual and operate across state lines so that no one state can really catch them and hold them accountable for their practices.