AI Wessex creates a false dichotomy where either SCOTUS has a blank check to make anything up and say that's what the constitution means (as occurred with Gender Neutral Marriage and Medical Marijuana), or we have to be originalists like Scalia pretended to be (and sometimes actually was). To put it into common parlance, Al is telling us that the only choices are legal fundamentalism and legal nihilism.
But contrary to Al's assumption, Originalism and Postlegal fatwaism are not the only schools of legal "interpretation," and in fact were not even significant schools of interpretation until very recently.
Neither I nor Seriati are Scalian Originalists or Stephensian Postlegalists, and yet we still disagree with each other on certain issues of constitutional interpretation. I do think the Constitution implies that SCOTUS does have final say as far legal interpretation of certain (but not all) issues. But even that final interpretation is subject to the rotation of SCOTUS members and alteration of their opinions over time, to constitutional amendment, and to three other highly controversial (but entirely constitutional) means:
1. A Supreme Court Justice may be impeached. Impeachment is one constitutional procedure in which the Supreme Court does NOT have the last say, and even where Congress holds the unchecked power of constitutional interpretation. I believe that Postlegal treatment of the constitution, to the extent that it encroaches in legislative prerogative suffices for "High Crimes and Misdemeanors." And as Congress found in the Andrew Johnson impeachment, encroachment on legislative powers is a matter meet for an impeachment proceeding. (Note that Johnson was acquitted in his impeachment, but that's a matter of fact, not of law.
2. Congress may allow the President to expand the number of Justices on the Supreme Court, effectively "packing" the court. This happened many times during the first century of the Republic, but hasn't happened for over 120 years, IIRC.
3. The president and/or Congress can simply threaten #1 or #2, as FDR did when he faced a court packed with reactionary postlegalists who were constantly pulling "constitutional" protections out of their asses for megacorporations. (For example, that the "Constitution" prohibited Congress nor the States had the power to pass laws prohibiting working a 10 year old 12 hours a day in a coal mine, etc).
While most legal historians today exoriate FDR for #3, they are IMO full of sanctimonious baloney. I suspect Seriati will disagree with me on that.
I agree with Seriati that the Court has a duty to interpret the Constitution in good faith, and that when it fails in that duty, as it did in Raisch and in Dredd Scott and other cases, the people have a first amendment rights to petition government for redress of grievances. I think, but doubt Seriati will agree, that the government's remedy for SCOTUS bad faith includes the tools in my options 1,2, and 3 above.