As a layman (though I worked in the mortgage industry, it was as a software developer fairly distant from underwriting), I've long considered it an unfortunate development that manual underwriting had fallen by the wayside. Now, as a self-employed developer, I've seen how difficult it is to obtain a refinance mortgage without a W2.
That said, the example used in the article seems frightening. A $600,000 mortgage on a part time student income where the borrower is forced to rent rooms to make the payments? However unfortunate the normal underwriting standards are for some portion of the population, it seems that lenders continue to take whatever rope they are given and insist on hanging themselves with it.