Your last sentence is an interesting idea. But the "case or controversy" requirement for justiciability in federal court, which represents a limit on the power

Your last sentence is an interesting idea. But the "case or controversy" requirement for justiciability in federal court, which represents a limit on the power of the federal judiciary, comes from Article 3 Section 2 of the Constitution. It is a hard limit beyond which even Congress cannot grant additional power. Congress can limit the power of the judiciary to hear cases more narrowly than the Constitution does, e.g. the diversity / federal question requirements for federal jurisdiction, which are Congressional limits on the power of the federal courts. Your plan could potentially be accomplished by amending the Constitution but I do not think Congress could pass such a law.