By the ‘company’ called the US Congress, the Federal Reserve and the OFHEO, and their combined lack of oversight, and the enabling that went with it.
It's kind of a chicken and the egg thing.
What came first, the lobbyists or the policy that enabled them to become rich enough to manipulate policy?
Did congress empower Roland Arnall to create Long Beach Savings? Did they force him to give up his banking license and create ACC - whose sole mission was originate mortgages? Nope.
Technically, the article title is incorrect - the Subprime pirate armada was built in Long Beach before it sailed to OC with Admiral Arnall at the helm.
Sorry, though I'm certainly not going to argue that Congress doesn't have corruption problems; the whole "but but but, the big bad government maaade us do it" excuse just does not fly.