True. I think we've been down this path before. What to fill the libertarian void (value-void) with?
Hedonism, epicureanism, stoicism, nihilism, etc. all valid answers. Some better than others in my opinion. This is also another weakness about libertarianism.
I imagine it is hard to only keep to the market, personal values will creep in especially if you act on the modern political arena. Since libertarianism does _not_