On the other hand, by giving its decision, the Legislature can use it's powers to moot the decision in many cases,
Agree, but I suspect that fact does color their decisions. I read about the New Deal time and the threat of that law being passed to stack the court had an effect on at least one of the justices and they quit overturning the New Deal laws. I just say all this because at first blush one might think the Supreme Court is more supreme than it really is.
"God and the Soldier we adore, in time of trouble but not before. When the danger's past and the wrong been righted, God is forgotten and the Soldier slighted."