Perhaps you should consider the possibility that the reason why libertarians assume a default "gubmint bad!" reaction to new policy interventions is that they a

Perhaps you should consider the possibility that the reason why libertarians assume a default "gubmint bad!" reaction to new policy interventions is that they are sensitized due to decades of experience seeing multitudes of government interventions both (a) to achieve their intended outcomes and (b) create unintended consequences, often worse than the problems they are meant to solve, instead. Personally, I find it very very strange that many of the people who call for regulation as a remedy to perverse incentives manifest in commercial markets seem unwilling to recognize the existence of even more perverse incentives in the political realm. If people seeking profit sometimes do bad things to get it, why would people seeking political power be expected to behave differently?