>And clearly, since it is better than every other method, it is the best by definition.
That isn't how "by definition" works. For that to be the case you would have to define everything to be inferior which is a purely subjective choice.
What you should have said is something along the lines of "based on our best efforts this has had the most success" which has completely different implications, such as failure to discover or adopt better systems.
It is especially strange since what you are talking about violates neoclassical models. There is no wealth inequality built into those models so why would it be obvious that this will be the best solution forever?
>. If other things were not done it is because they were not possible: since possibility requires an agent to execute and since no agent succeeded in executing a better plan it is, by definition, impossible.
Except The Wörgl Experiment succeeded in every respect. Stop rewriting history. Your theory is also unable to explain the success of the Chiemgauer [0], which is severely limited by legal problems and the ability to find loopholes.
After all, if your theory was correct and no improvement is possible, then why does improvement occur anyway? Feels like you are just taking the stance of an authoritarian thug.
[0] The Chiemgauer makes money off of ending capitalism, which is a paradox if we assume it is impossible for anything to be better than capitalism.