That is all policies and political structures are testable and tested to see their effect on those three (or other suggested) factors. If a policy doesn’t reasonably work then it’s simply not continually employed. I’m curious to see what factors others think ought to be used.
It seems most political systems now were built without science in mind and utilize it as an afterthought to help develop legitimacy for policies individuals want. Generally politics across countries seems deeply emotionally driven and not fact driven. That is people have a feeling that an idea is a good idea and then they cobble together whatever they can to support that point without any unified measure of good or better. Ideally it ought to be the other way around, fact or evidence informed policy generation.
Okay, then returning, vulgar empiricism is inferior to dialectical materialism because the dialectical materialist understands how change occurs and develops, while vulgar materialists fail to. I gave an example of how at a macro level this manifests in either focusing on reformism or revolution and development.
Why don’t you propose an example of how you would use the scientific method in practice to test for a better system, and we will see if you make metaphysical errors in your approach. After all, my point is that philosophy is simply how we view the world, and we all have a given philosophy, even if we don’t acknowledge it, and it determines how we interpret the objective reality of the world.