Several of the arguments in this case have credence on their face for different reasons.
There is the idea of an agreement or contract: “I do this, if you do that.” One should not break a contract carelessly.
Or, the “fairness” argument where one side seems to want to change the rules after the game started; that doesn’t seem right.
And, then there’s the constitutional rule of law argument: Congress holds the power of the purse when it comes to public monies. Enough said.
Bottom line…and in a different case, Qliance found this out the hard way…when you get in bed with the gov’t, expect to get screwed!
Forum for Healthcare Freedom
On the importance of transparency… may I present exhibit A: 
One expert told KHN that the variation has nothing to do with the cost of the drug, but stems from secret negotiations between health plans and providers. While patients are expected not to care since the shot is free to them, these costs come back to bite in the form of higher premiums — which is one of the major complaints about the ACA.”
