When a tax is imposed upon the profits of stock in a particular branch of trade, the traders are all careful to bring no more goods to market than what they can sell at a price sufficient to reimburse them for advancing the tax. Some of them withdraw a part of their stocks from the trade, and the market is more sparingly supplied than before. The price of the goods rises, and the final payment of the tax falls upon the consumer. But when a tax is imposed upon the profits of stock employed in agriculture, it is not the interest of the farmers to withdraw any part of their stock from that employment. Each farmer occupies a certain quantity of land, for which he pays rent. For the proper cultivation of this land a certain quantity of stock is necessary; and by withdrawing any part of this necessary quantity, the farmer is not likely to be more able to pay either the rent or the tax. In order to pay the tax, it can never be his interest to diminish the quantity of his produce, nor consequently to supply the market more sparingly than before. The tax, therefore, will never enable him to raise the price of his produce, so as to1478 reimburse himself by throwing the final payment upon the consumer. The farmer, however, must have his reasonable profit as well as every other dealer, otherwise he must give up the trade. After the imposition of a tax of this kind, he can get this reasonable profit only by paying less rent to the landlord. The more he is obliged to pay in the way of tax, the less he can afford to pay in the way of rent. A tax of this kind imposed during the currency of a lease may, no doubt, distress or ruin the farmer. Upon the renewal of the lease it must always fall upon the landlord.
In the countries where the personal taille takes place, the farmer is commonly assessed in proportion to the stock which he appears to employ in cultivation. He is, upon this account, frequently afraid to have a good team of horses or oxen, but endeavours to cultivate with the meanest and most wretched instruments of husbandry that he can. Such is his distrust in the justice of his assessors, that he counterfeits poverty, and wishes to appear scarce able to pay anything for fear of being obliged to pay too much. By this miserable policy he does not, perhaps, always consult his own interest in the most effectual manner; and he probably loses more by the diminution of his produce than he saves by that of his tax. Though, in consequence of this wretched cultivation the market is, no doubt, somewhat worse supplied; yet the small rise of price which this may occasion, as it is not likely even to indemnify the farmer for the diminution of his produce, it is still less likely to enable him to pay more rent to the landlord. The public, the farmer, the landlord, all suffer more or less by this degraded cultivation. That the personal taille tends, in many different ways, to discourage cultivation, and consequently to dry up the principal source of the wealth of every great country, I have already had occasion to observe in the third book of this Inquiry.1479
What are called poll-taxes in the southern provinces
