I agree. They should take the law as they find it. Out of respect for the Constitution's separation of powers, the justices should not take it upon themselves to put words into the mouth of Congress.
On a related note, I would like to see the impeachment of Supreme Court justices taken seriously again. Only one has ever been impeached (he escaped conviction in the Senate trial) and the consensus seems to be that that was a one-time thing from Jefferson's day that is unthinkable today. But why the hell shouldn't it be?
The people of the states are the final arbiter of what the Constitution means, despite the Court's long campaign to arrogate that authority entirely to itself. Aside from impeaching justices, there are several other ways for the other two branches to nullify the effect of Supreme Court decisions. None of this things should ever be done lightly, but that does not mean they should never be done. Recall, for example, that President Lincoln just declined to enforce parts of the Dred Scott decision. If we the people don't like something, we don't have to live with it.
Congress was always meant to be the most powerful of the three branches of the federal government. Anyone who thinks Congress can't tell the Supreme Court what to do, when the will of the people is strong enough, should read Ex Parte McCardle, 74 U.S. 506 (1869). Congress passed a law that stripped the Court of jurisdiction to decide the McCardle case after it had already heard oral arguments. The Court said this in concluding its opinion:
"Without jurisdiction the court cannot proceed at all in any cause. Jurisdiction is power to declare the law, and when it ceases to exist, the only function remaining to the court is that of announcing the fact and dismissing the cause . . . ."
Congress's power to limit the appellate jurisdiction of the Court is the key to McCardle:
"The Supreme Court shall have appellate jurisdiction, both as to law and fact, with such exceptions, and under such regulations as the Congress shall make." U.S.C. Art. III, sec. 2, cl. 2.