Mortgages Consolidated Into Government, Big Banks

from WSJ:
More than half of U.S. residential mortgages are now being made by just three large banks.
It's a stunning change, but is it good for the housing market, and to what extent will it boost profits over the long-term for this elite trio, Wells Fargo, Bank of America and J.P. Morgan Chase?
Right now, housing remains on government life support. Treasury-backed entities are guaranteeing around 85% of new mortgages, while the Fed buys 80% of the securities into which these taxpayer-backed mortgages are packaged.