"If you Need a label, call Libertarianism the richman's anarchy." Seducing the Left: The Third Party that Wants YOU, Mark Paul, Mother Jones, May 1980.
The linked article is a good rundown on the Koch Bros. and the Cato Institute of that time (1980).
I run contrary to Libertarianism on many fronts. I love altruism and collectivism. Please note, however, that real altruism precludes coercive collectivism.