I _used_ to be super hardcore minarchist Libertarian.Yeah, me too. And I think you're still making the same mistake I used to, in a different sense--you're picking nice-sounding, moralistic idealism over pragmatism.
Of the systems so far tested, some sort of Stateful mixed economy seems the best.[1] Of the parameters you can adjust in that system, we have observed various effects. The way to find whatever political truths we can is the same as the way to find other truths--empiricism. Empiricism is hard, especially with political systems, but it's better than moralistic or idealistic handwaving of any variety. It's not terribly convincing to philosophize about a political ideal. Why not take what we've got and find evidence-based ways of improving it?
[1] Of the systems so far untested, we have no data. They might turn out to be complete disasters, impossible to implement, or so strange almost no one outside a few logically-minded dogmatists would possibly agree to them. I would actually support voluntary social experiments in setting up different political systems, but you would have to make them compatible in some way with the status quo without hurting the validity of the experiment. Large scale nature preserves with small numbers of primitivists, protected by an existing State from redevelopment of the land or hostile violence from anti-primitivists, would be one example of this. Another is similar to something interestingly adopted by China: the "special economic zone".