http://en.wikisource.org/wiki/The_Wealth_of_Nations - for the defence of the society, it might not always be prudent to depend upon our neighbours for the supply; and if such manufacture could not otherwise be supported at home, it might not be unreasonable that all the other branches of industry should be taxed in order to support it. The bounties upon the exportation of British-made sailcloth and British-made gunpowder may, perhaps, both be vindicated upon this principle. But though it can very seldom be reasonable to tax the industry of the great body of the people in order to support that of some particular class of manufacturers, yet in the wantonness of great prosperity, when the public enjoys a greater revenue than it knows well what to do with, to give such bounties to favourite manufactures may, perhaps, be as natural as to incur any other idle expense. In public