The greatest part however of exclusive priviledges are the creatures of the civil constitutions of the country. The greatest part of these are greatly prejudicial to society. Some indeed are harmless enough. Thus the inventor of a new machine or any other invention has the exclusive priviledge of making and vending that invention for the space of 14 years by the law of this country, as a reward for his ingenuity, and it is probable that this is as equall an one as could be fallen upon. For if the legislature should appointa pecuniary rewards for the inventors of new machines, etc., they would hardly ever be so precisely proportiond to the merit of the invention as this is. For here, if the invention be good and such as is profitable to mankind, he will probably make a fortune by it; but if it be of no value he also will reap no benefit.
Mensaje original enviado por UNAbomber
Lectures of Jurisprudence, Monday Jan. 10th. 1763, Exclusive Priviledges.
When a company of merchants undertake, at their own risk and expence, to establish a new trade with some remote and barbarous nation, it may not be unreasonable to incorporate them into a joint stock company, and to grant them, in case of their success, a monopoly of the trade for a certain number of years. It is the easiest and most natural way in which the state can recompense them for hazarding a dangerous and expensive experiment, of which the public is afterwards to reap the benefit. A temporary monopoly of this kind may be vindicated upon the same principles upon which a like monopoly of a new machine is granted to its inventor, and that of a new book to its author.
The Wealth of Nations, V.1.119
Ahí tenés dos ejemplos de Adam Smith favoreciendo la intervención del Estado en el mercado a través de la creación de monopolios temporales. Si realmente leiste The Wealth of Nations, tenés docenas de ejemplos para elegir. Es más, Adam Smith fue uno de los que sentó las bases para las leyes antitrust.