Here is my issue with Laissez-Faire in general (this includes Objectivist type minarchism as well as anarcho-capitalism). One of the fundamental roles of nation-states has been to provide for military defense of the country. In order to defend the country, the state must ensure that it has all of the necessary supplies to wage war, that is, food, ammunition, weapons, soldiers, etc. If all of these things are controlled by markets, problems immediately ensue. Generals must be able to make plans for national security that look as much as 20 years ahead. If prices for goods fluctuate in the meantime, as they often do, it would be next to impossible to ensure that the military has the supplies it needs to carry out its objectives. Secondly, markets encourage economic specialization in order to take advantage of the law of comparative advantage. But from the viewpoint of national defense, this is a death sentence. For example, if one country specializes in the production of textiles, let's say, and another country specializes in the production of food, and the first country depends on trade with the second country for food, then the first country will be at a serious disadvantage if the two countries go to war (the second country will cease to trade its food to the first country, starving it). This is why, as the modern nation state emerged during the period 800 - 1400 AD, European kings started developing permanent taxation (before, taxes were only levied during times of war), tariffs on imported goods, and other kinds of control over trade. They needed taxation in order to pay off debts during peace time that were incurred in war time. Tax laws became extremely complicated because they were intentionally structured in such a way as to ensure that there is no outflow of important goods during wartime. They later also imposed tariffs on foreign goods in order to protect domestic industry, thereby maintaining their productive independence from threatening neighboring countries. All of these practices continue to the present day, and are just as necessary now as they were back then, if not more so.