Do GSEs help make housing affordable?

Mish says GSE's are making housing unaffordable:

It seems to me that the mission of Aunt Fannie and Uncle Fred has been long lost. One of the reasons housing is not affordable is there are 280 active Federal bills to "make housing affordable".

By charter, the GSE mission is to provide liquidity, stability and affordability to the nation’s mortgage markets. Well we sure have witnessed (for now) success on the liquidity front, but as for price stability and affordability I doubt the failure could possibly have been any greater.

If anyone really wants to make housing affordable, they should scrap nonsense about the "ownership society", eliminate the housing deduction, cancel 280 government programs to "make housing affordable", not cut interest rates to 1% in a silly panic, and with tears in my eyes (I am a sentimental kind of guy), finally bury Aunt Fannie and Uncle Fred.

What a scam.