The Wealth of Nations by Part 4 Chapter 7 Page 224

necessary for the welfare of the society as a near one; the goods which the distant employment deals in being necessary, perhaps, for carrying on many of the nearer employments. But if the profits of those who deal in such goods are above their proper level, those goods will be sold dearer than they ought to be, or somewhat above their natural price, and all those engaged in the nearer employments will be more or less oppressed by this high price.

Their interest, therefore, in this case requires that some stock should be withdrawn from those nearer employments, and turned towards that distant one, in order to reduce its profits to their proper level, and the price of the goods which it deals in to their natural price. In this extraordinary case, the public interest requires that some stock should be withdrawn from those