Well i do consider myself a libertarian though not the same as what this 'libertarian philosophy' entails. I'm whats considered more a 'social libertarian' and personally believe in personal/social freedom just like all libertarians, though on the economic side of things, i believe capitalism to be inherently exploitative and that it will eventually be dismantled by a post-scarcity state due to technological prowess.
Capitalism has done alot of good for the world and is alot better then other economic systems we've had in history (feudalism, warlordism, merchantilism etc) though if we are to progress as a society, the inherent flaws of capitalism: the inability of the free market to regulate the distribution of weath and its inefficiencies in 'market failure' with respect to enviromental issues etc are massive flaws that need to be addressed in our current age. A socialist democracy in which the factors of production and capital are in the public which allow the full creative potential of human beings to be realised would be alot better. This would probably take a while as the technological ability of society is not at a capacity to allow for a techno-utopian society so capitalism will have to do for now. Though it should be more keynesian with regulative measures to stop the concentration of wealth getting smaller amount high classed individuals.
The common argument for capitalism is the whole 'greed/profit' incentive that pretty much states that productive capacity and an increase in the overall standard of living will not increase unless people are acting in their own self interests. But what capitalism produces is the desire for the accumulation of wealth and profits, without rather the 'need' for a specific commodity or entity. The aim of capitalism is to make a profit, not make society better in general, that comes as a side benefit of the profit incentive. To say that its in 'human nature' to be greedy is fallacious and unwittingly creates the subconcious belief on how humans must be, therefore effectively creating that greedy narcassitic nature.
Its impossible to make a statement on human nature as we have seen through technological and societal progression, the average human conciousness has changed considerably. Thomas Hobbes believed it would be impossible for humans to survive without a monarchy as they would become anarchic, maybe so true in that era, but if it wasn't for the constant reformations and revolutions of political visionaries, the true potential of humans wouldn't be further realised. As the advent of parlimentarianism, though we still have a long way to go and a constant evolution of our economic and social ideas must be done if we are to move foward. And a right wing libertarian unregulated capitalistic system would move humans further into explotation and would destory years of workplace regulations that have served as human betterment. (8 hour working days, no slave labour, child labour). Though we can see in countries like colombia, workers are exploited in coca cola factories due to the absence of workplac reforms that serve human interest rather than profit incentives. Self management factories in argentina have shown (zanon, brukman etc) that neo-classical, capitalistic economics cannot be deemed to be always correct in all contexts and the whole profit incentive goes to an obilivion in that country. So before i write down anymore since i have to go, i think a libertarian movment in which is advocated in this thread would be dangerous for the evolution and advancement of the human race.