Yes, and they can do that if they wanted to. The Supreme Court has the power to interpret the Constitution.
Why not get rid of the whole charade and just replace it with "whoever is appointed to the Supreme Court can make up any law as they feel like it"? It has the same meaning, but it's an awful lot clearer!
In fact, I think there's a term for a ruler with complete power who's there for life, something like an "absolute monarchy"?