In the end, they still accept or reject laws, with no accountability whatsoever. The supreme court’s decisions are laws, for all intent and purposes, and have just as much weight as what Congress writes.

The incestuous relationship between the judiciary and the legislative branch in common law systems is very problematic and does not allow true separation of powers. Like so much in our democratic governments, this works as long as most participants behave in good faith, but breaks down when some do not.