Most forms of taxation constitute "expropriation of private property by the state", which libertarianism strongly opposes.

And in that passage I quoted from his article, it is funds derived from taxation - since that is the source of all government funding - that the author is alleging libertarianism/free-market-capitalism not only accepts the wasting of, as long as the waste is under the umberage of the government provisioning security services, but also, in its governance philosophy, expressly forbids having any rules to reign in the wasting of. Even spelling out his logic leaves me dumbfounded by its shameless dishonesty and absurdity.

I can't believe I even have to explain this: his claim is completely baseless, with nothing in any mainstream definition of libertarianism to justify it, and moreover, it contradicts one of the core concerns of libertarians/libertarianism, which is the avoidance of inefficiency and waste when expending tax dollars.

The article is an ideological hit piece, and it's crafted in utterly bad faith. But hey, as long as it's supporting the right political tribe, that's evidently okay for some people. The ends justify the means, i.e. bad faith sophistry is justified by the righteousness of the larger cause.