Why is libertarianism so infallible?

It is due to it being the application of political science. It does not permit failed policies to be continued fruitlessly year after year with idealistic fervour, it is next to impossible for anyone surrounded by fierce libertarian critics to continue clinging on to lies. It is a purely functional machine, lubricated with justice and fueled by free speech.

Under libertarianism, with economic control going to private organisations, corporations would eventually be too powerful, crushing individual liberties and dominating the political scene as well unless a true free market could be acheived. The chances of that not working are pretty good.