The problem is that every economic system ever proposes is predicated on a bunch of assumptions that do not necessarily hold true over time. So you end up with a model that may work for a while but that's not how science works. Science extracts facts from observations using the scientific method. Social constructs - and social sciences of which economy is a branch - effectively model people and people are emphatically not as predictable as lab equipment and substances.
So you will always end up with fiction dressed up in a scientific coat. It looks and talks like science but it really isn't. There are no testable hypothesis, there is a ton of politics and there will never be consensus.
So you will always end up with fiction dressed up in a scientific coat. It looks and talks like science but it really isn't. There are no testable hypothesis, there is a ton of politics and there will never be consensus.