The Wealth of Nations by Part 2 Chapter 5 Page 5

furniture of his shop, and which yields him a revenue. he would be forced to place in that part of his stock which is reserved for immediate consumption, and which yields him no revenue. Nothing can be more convenient for such a person than to be able to purchase his subsistence from day to day, or even from hour to hour, as he wants it. He is thereby enabled to employ almost his whole stock as a capital. He is thus enabled to furnish work to a greater value, and the profit, which he makes by it in this way, much more than compensates the additional price which the profit of the retailer imposes upon the goods.

The prejudices of some political writers against shopkeepers and tradesmen are altogether without foundation. So far is it from being necessary either to tax them or to restrict their numbers that they can never be