Can Congress Control Medical Spending?

At a recent health policy forum in Washington, D.C., noted health economist and wit Uwe Reinhardt shed some light on that question:

[T]he following can be said: the United States Congress has absolutely no interest in reducing . . . dubious Medicare expenditures. Let me repeat that. The United States Congress has no interest whatsoever in reducing dubious Medicare expenditures . . .

So the interesting and intriguing question for all, for journalists too, [is]: why is the Congress so disinterested in cost containment when it constantly whines about having to restructure Medicare? That is to me a huge mystery.

Obviously, Prof. Reinhardt hasn't read this.