Lack of infrastructure in such a Libertarian idealized system would weaken the country dramatically.
What about libertarianism says there would be a lack of infrastructure?
Lack of regulation would allow the greedy to eventually destroy the system to their own benefit.
Why? In a libertarians eyes no legitimate transaction can occur until both parties agree it is fair. If a buyer deems a sellers terms unfair he is free to seek a better deal somewhere else. If a seller doesn't agree to the price a buyer is willing to pay he is free to seek someone else who will give him the price he wants. As I said to another you also seem to believe libertarianism is one stepped removed from anarchy. It isn't