The law which prohibited the manufacturer from exercising the trade of a shopkeeper, endeavoured to force this division in the employment of stock to go on faster than it might otherwise have done. The law which obliged the farmer to exercise the trade of a corn merchant, endeavoured to hinder it from going on so fast. Both laws were evident violations of natural liberty, and therefore unjust; and they were both too as impolitic as they were unjust. It is the interest of every society, that things of this kind should never either be forced or obstructed. The man who employs either his labour or his stock in a greater variety of ways than his situation renders necessary, can never hurt his neighbour by underselling him. He may hurt himself, and he generally does so. Jack of all trades will never be rich, says the proverb. But the law ought always to trust people with the care of their own interest, as in their local situations they must generally be able to judge better of it than the legislator can do. The law, however, which obliged the farmer to exercise the trade of a corn merchant, was by far the most pernicious of the two.
It obstructed not only that division in the employment of stock which is so advantageous to every society, but it obstructed likewise the improvement and cultivation of the land. By obliging the farmer to carry on two trades instead of one, it forced him to divide his capital into two parts, of which one only could be employed in cultivation. But if he had been at liberty to sell his whole crop to a corn merchant as fast as he could thresh it out, his whole capital might have returned immediately to the land, and have been employed in buying more cattle, and hiring more servants, in order to improve and cultivate it better. But by being obliged to sell his corn by retail, he was obliged to keep a great part of his capital in his granaries and stack yard through the year, and could not, therefore, cultivate so well as with the same capital he might otherwise have done. This law, therefore, necessarily obstructed the improvement of the land, and, instead of tending to render corn cheaper, must have tended to render it scarcer, and therefore dearer, than it would otherwise have been.