Why is libertarianism so infallible?

Libertarianism is the inclusion of every sapient being into the decision making process and all that logically follows from that. Utilitarianism is the objective of ensuring the most happiness for all sapient beings and all that logically follows from that. Sometimes they compliment each other, other times they contradict.

Discuss.

>>245
I don't see flaws in the capitalist system. I have nothing against it. What I know is that the weakest link of any system is the human element. We are not robots and whatever system we have there wil be humans who abuse it. No system is as such perfect or infallible. I am all for a capitalist system with has a governmental control over it for regulations and oversight like we currently have in north america.
We need the government to make regulations for the products we consume and for the environment. We need the government to prevent big monopolies. We need the government to make laws and to protect us with an army and police force. We need the government to take care of the poor, the sick and jobless.