second, hay, cattle, or wood, of the same value of 1000 francs. What has happened? From the one, a quarter of his net income, 4000 francs, has been taken; from the other, whose income was 10,000 francs, a tenth only has been taken. Income is the net profit which remains after replacing the capital exactly in its former state. Has a merchant an income equal to all the sales which he makes in the course of a year? certainly not; his income only amounts to the excess of his sales above his advances, and it is on this excess only that taxes on income should fall."
M. Say's error in the above passage lies in supposing that because the value of the produce of one of these two farms, after re-instating the capital, is greater than the value of the produce of the other, on that account the net income of the cultivators will differ by the same amount. M. Say has wholly omitted the consideration of the different amount of rent, which these cultivators would have to pay. There cannot be two rates of profit in the same employment, and therefore when produce is in different proportions to capital, it is the rent which will differ, and not the profit. Upon what pretence would one man with a capital of 2000 francs, be allowed to obtain a net profit of 10,000 francs from its employment, whilst another with a capital of 8000 francs would only obtain 4000 francs? Let M. Say make a due allowance for rent; let him further allow for the effect which such a tax would have on the prices of these different kinds of raw produce, and he will then perceive that it is not an unequal tax, and further that the producers themselves will not otherwise contribute to it, than any other class of consumers.