Newton had some fine ideas - that Einstein corrected. And Einstein has some fine ideas - that were corrected in Quantum physics.
Age does not make an idea obsolete. A change in the underlying assumptions and conditions may. Economists are making predictions that are wildly incorrect, and by their own words they don't know why. I merely propose the the world has changed sufficiently to invalidate Ricardo.
As for the Constitution - keep in mind, it has changed through various amendments.
Propose all you want, but offer some evidence. By the way, Newton is still good enough for NASA to guide its space probes (that is when they remember their metric conversions). You are referring to fine tuning of ideas, not obsolescence.