Cause of the financial meltdown via Commentary Magazine

In February of 2009, Peter Wallison carefully presented the real reasons for the financial meltdown in the article from Commentary Magazine.  Much has been written since about the cause and reason this meltdown occurred, however Wallison's piece has stood the test of time as a definitive explication of the whole sordid event.  Cutting to the chase one could say that the underlying cause of this fiasco was the politicization of the housing market.