There is plenty of blame to go around for the U.S. housing bubble, but not much of it belongs to Fannie Mae and Freddie Mac. The two giant housing-finance institutions made many mistakes over the decades, some of them real whoppers, but causing house prices to soar and then crater during the past decade weren't among them.

It has become fashionable to rail against government intervention in the economy, and the FHA is a favorite example by those trying to show the government's overreach. In reality, the FHA shows how government action during the Great Recession forestalled a much worse economic fate.

The biggest culprits in the housing fiasco came from the private sector, and more specifically from a mortgage industry that was out of control.

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