The Wealth of Nations by Part 2 Chapter 3 Page 46

So great a share of the annual produce of the land and labour of the country has, since the Revolution, been employed upon different occasions in maintaining an extraordinary number of unproductive hands. But had not those wars given this particular direction to so large a capital, the greater part of it would naturally have been employed in maintaining productive hands, whose labour would have replaced, with a profit, the whole value of their consumption. The value of the annual produce of the land and labour of the country would have been considerably increased by it every year, and every year’s increase would have augmented still more that of the following year. More houses would have been built, more lands would have been improved, and those which had been improved before would have been better cultivated, more manufactures would have been established.