The linked article is about Henry Paulson. A Republican. Appointed by George W. Bush. A Republican. Who was President when this happened.
Obviously “conservative” and “Republican” are not freely interchangeable. Many intelligent people have argued that GW Bush wasn’t really fiscally conservative, considering how much he increased government spending. But he certainly was never called “liberal”.
Remember that it was de-regulation that allowed all the excesses of the bubble to occur. The free market largely created the bubble, just like free markets have done in past bubbles. Obviously power corrupts, but I’m not sure how the ills of the Bush government translate to “liberal = bad”? Even Ron Paul doesn’t advocate for the sort of small government that would limit federal power that much.