The Problem with Libertarianism

Life helps them who help themselves x50 (sarcasm). Libertarianism doesn't really work. My problem(s) with it is that it has a large degree of heartlessness to it (that's the easy part), but most of all it is merely "non-sustaining". Our country presently has an infrastructure that isn't going to pay for itself, and the assumption is "I guess" that the rich will maintain highways (good luck on that one) to maintain their profits. Otherwise seeing we have "no taxes" where the hell does the money come to pay for roads? Do we just go back to dirt roads? Education becomes private or home schooled? So, everyone is going to be making enough money to pay for this kind of stuff?  Really? It also assumes that everyone will be ambitious enough to own their own business, and that wage slaves will no longer exist because of this?
I don't know, all of this sounds really naive. It also sounds like something the very rich would push to make the poor think they have any chance of "the big life". Also naive. There will always be a working class, because who will do all of this labor?Therefore as wage earners they form the repressed class that "will be" low paid, and likely in poverty. 
So, I essentially see Libertarianism as a voice of "greedy people that are so unwilling to help anyone in the literal sense that they come up with hair brain schemes that probably cost more than if they were just to help others out." That doesn't mean all Libertarians are that way they absolutely aren't, but I'm talking about the premise of it all. It just doesn't work. All it would do is hand wealth to the richest, make the poor even poorer, and bring us back to the days of the lawless old west most likely except with lots of preventable illnesses. Thanks to Libertarian deregulation I wouldn't trust your drinking water anymore, or your food from stores, or the safety of your car, or that snake oil someone just sold you for you fucking lumbago. I am being a bit unfair because any "purist" system of politics "won't work".  We all saw what happened with "Communism" ... yeah, that went over well.
In the end there has to be balance, and I see our country so totally "rightwinged" out that balance is just not able to take the phone right now. On top of all this, you have Christian religion trying to turn our nation into a fascist theocracy. So do we go with Conservative Libertarian Theocracy? Many of the GOP candidates in 2012 could be summed up as such. Seems to be a very unfortunate tonic that will kill a lot of people, and take a deity sized shit on our actual freedoms. The very rich ... they watch ... and they wait. I feel Libertarianism is a kind of delusional political system propagandized by those very rich who could care less if our country ends up in the shit can. I just can't figure why people don't see that. Is it the greed ... the reckless desire for power? I'm not sure.