I would tend to agree with statements of this type.
Libertarianism is certainly an utopian ideal, unfounded as of now, and maybe ever on any grand scale.
It would require a strong-willed work force, one that actively educated itself on many different principles and facets of the economy and government. Private watchdog groups would have great power and expectation vested in them.
Otherwise, said workforce would quickly find themselves governed by corporate money interests.
Libertarians are often loathe to point out that brutal fact of a near-regulation free capitalist market, in spite of it's elephant-in-the-roomness. It's really what stops libertarianism dead in its tracks. Most people prefer less liberty in exchange for less responsibility.