[yummyfajitas]

the garbage was to be somebody elses problem

Simply false. The garbage was usually your own problem, the AAA tranch was sold to someone else. This is what took down Lehman, for example. BNC Mortgage (owned by Lehman) made bad loans, Lehman sold off the AAA tranches while holding the riskier tranches for themselves.

[fanboy123]

Originators underwrote the mortgages who usually sold them to banks who packaged them into bonds. Later on to streamline this process the banks bought mortgage originators (lehman bought bnc) because their appetite for product was huge.

But originally the loans were passed onto somebody else (and most private label issuance by notional balance was in fact not held by either originator nor the underwriter/ibank). It was a method of breaking out credit risk (the borrower risk was separated from originator risk) and seen as a feature. Really it was the whole point of securitization -- to get bankruptcy remoteness for credit products.

Originate to securatize is now seen as a problem because it does not give the originator an incentive to make good, proper loans (which is already tough to do). We dont know if credit standards and checking would have become so lax without the securtization machine during 1998-2007 but it seems unlikely.