If you think about the implications of what the defense is claiming, then the incentive for attracting private capital to mortgage market is being thrown away. Who would ever want to be a partner with the government with that case as a precedent? Fool me once -gse's- shame on you. Fool me twice... Private capital is not that stupid! Some day the government might figure out that even if they "win", they actually lose! They can't replace the Gse's with out private capital. Only alternative is all government but Corker& company will never get Hensarling and Shelby to go for that! Stalemate! The longer they drag this out-(court cases ), the longer they hold the housing finance market hostage!
Bringing to the court's attention a ruling which may prove precedent: pretty logical quite frankly.
"Those who do business in the regulated field cannot object if the legislative scheme is buttressed by subsequent amendments to achieve the legislative end."