The Wealth of Nations by Part 4 Chapter 5 Page 98

imported either duty free, or upon paying only a small duty, it might have been exported again, with the benefit of the bounty, to the great loss of the public revenue, and to the entire perversion of the institution, of which the object was to extend the market for the home growth, not that for the growth of foreign countries.

III. The trade of the merchant exporter of corn for foreign consumption certainly does not contribute directly to the plentiful supply of the home market. It does so, however, indirectly. From whatever source this supply may be usually drawn, whether from home growth or from foreign importation, unless more corn is either usually grown, or usually imported into the country, than what is usually consumed in it, the supply of the home market can never be very plentiful. But unless the surplus can in