All taxes upon consumable commodities, therefore, tend to reduce the quantity of productive labour below what it otherwise would be, either in preparing the commodities taxed, if they are home commodities, or in preparing those with which they are purchased, if they are foreign commodities. Such taxes, too, always alter, more or less, the natural direction of national industry, and turn it into a channel always different from, and generally less advantageous than that in which it would have run of its own accord. Thirdly, the hope of evading such taxes by smuggling gives frequent occasion to forfeitures and other penalties which entirely ruin the smuggler; a person who, though no doubt highly blamable for violating the laws of his country, is frequently incapable of violating those of natural justice, and would have been, in every respect, an excellent