1. Can a proper constitution that is carried out dutifully by a central government increase human flourishing?
No, if someone can legally use force to rob you and get stuff for free, they will. That's the ultimate reason why government exists in the first place. If the true purpose of government were to increase human flourishing, then it would require almost perfect information of resources and preferences. If it possessed that ability, the services it would provide would be so good, that it wouldn't need to use force to fund its operations.
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