The Errors of Classical Liberalism
As widespread as the classical liberal view is regarding the necessity of the institution of a state as the provider of law and order, several rather elementary economic and moral arguments show this view to be entirely misguided.
Among political economists and political philosophers it is one of the most widely accepted proposition that every "monopoly" is "bad" from the viewpoint of consumers. Here, monopoly is understood as an exclusive privilege granted to a single producer of a commodity or service, or as the absence of "free entry" into a particular line of production. For example, only one agency, A, may produce a given good or service, X. Such monopoly is "bad" for consumers because, shielded from potential new entrants into a given area of production, the price of the product will be higher and its quality lower than under competitive conditions. Accordingly, it should be expected that state-provided law and order will be excessively expensive and of particularly low quality.
However, this is only the mildest of errors. Government is not just like any other monopoly such as a milk or a car monopoly that produces low quality products at high prices. Government is unique among all other agencies in that it produces not only goods but also bads. Indeed, it must produce bads in order to produce anything that might be considered a good.
As noted, the government is the ultimate judge in every case of conflict, including conflicts involving itself. Consequently, instead of merely preventing and resolving conflict, a monopolist of ultimate decision-making will also provoke conflict in order to settle it to his own advantage. That is, if one can only appeal to government for justice, justice will be perverted in the favor of government, constitutions and supreme courts notwithstanding. Indeed, these are government constitutions and courts, and whatever limitations on government action they may find is invariably decided by agents of the very same institution under consideration. Predictably, the definition of property and protection will be altered continually and the range of jurisdiction expanded to the government's advantage. The idea of eternal and immutable law that must be discovered will disappear and be replaced by the idea of law as legislation — as flexible state-made law.
Even worse, the state is a monopolist of taxation, and while those who receive the taxes — the government employees — regard taxes as something good, those who must pay the taxes regard the payment as something bad, as an act of expropriation. As a tax-funded life-and-property protection agency, then, the very institution of government is nothing less than a contradiction in terms. It is an expropriating property protector, "producing" ever more taxes and ever less protection. Even if a government limited its activities exclusively to the protection of the property of its citizens, as classical liberals have proposed, the further question of how much security to produce would arise. Motivated, as everyone is, by self-interest and the disutility of labor but equipped with the unique power to tax, a government agent's goal will invariably be to maximize expenditures on protection, and almost all of a nation's wealth can conceivably be consumed by the cost of protection, and at the same time to minimize the production of protection. The more money one can spend and the less one must work to produce, the better off one will be.
In sum, the incentive structure inherent in the institution of government is not a recipe for the protection of life and property, but instead a recipe for maltreatment, oppression, and exploitation. This is what the history of states illustrates. It is first and foremost the history of countless millions of ruined human lives.