What obligation? Maximise what?/posturing
From Critiques Of Libertarianism
As with much libertarian posturing what they say and how they act are two different things. The libertarians are owned (whether they know it or not) by a group of super wealthy capitalists (Scaife, Koch, Walton, Coors, Mars, etc.). They get their ideologically motivated followers to spew things about "free" markets and maximizing profits, but all this is a cover for their true agenda -- making them even richer.
Robert Feinman, commenting in "What obligation? Maximise what?"