Well, usually if a lender encourages its underwriters to commit fraud and lend money to people who are not as likely to pay it back, the lender would go out of business.
Unless that lender happens to be a home mortgage issuer in the US, where you don't have to worry about that and the government bails you out.
So the structural problem is the continuous system of bailing out lenders, which means lenders don't need to spend money to do due diligence, and hence you end up with a "broken" system. But that doesn't absolve the individual people who are committing fraud and enabling it.
Unless that lender happens to be a home mortgage issuer in the US, where you don't have to worry about that and the government bails you out.
So the structural problem is the continuous system of bailing out lenders, which means lenders don't need to spend money to do due diligence, and hence you end up with a "broken" system. But that doesn't absolve the individual people who are committing fraud and enabling it.