Land and capital stock are the two original sources of all revenue both private and public. Capital stock pays the wages of productive labour, whether employed in agriculture, manufactures, or commerce. The management of those two original sources of revenue belongs to two different sets of people; the proprietors of land, and the owners or employers of capital stock.
The proprietor of land is interested for the sake of his own revenue to keep his estate in as good condition as he can, by building and repairing his tenants houses, by making and maintaining the necessary drains and enclosures, and all those other expensive improvements which it properly belongs to the landlord to make and maintain. But by different land-taxes the revenue of the landlord may be so much diminished; and by different duties upon the necessaries and conveniences of life, that diminished revenue may be rendered of so little real value, that he may find himself altogether unable to make or maintain those expensive improvements. When the landlord, however, ceases to do his part, it is altogether impossible that the tenant should continue to do his. As the distress of the landlord increases, the agriculture of the country must necessarily decline.
When, by different taxes upon the necessaries and conveniences of life, the owners and employers of capital stock find, that whatever revenue they derive from it, will not, in a particular country, purchase the same quantity of those necessaries and conveniences which an equal revenue would in almost any other, they will be disposed to remove to some other. And when, in order to raise those taxes, all or the greater part of merchants and manufacturers, that is, all or the greater part of the employers of great capitals, come to be continually exposed to the mortifying and vexatious visits of the tax-gatherers, this disposition to remove will soon be changed into an actual removal. The industry of the country will necessarily fall with the removal of the capital which supported it, and the ruin of trade and manufactures will follow the declension of agriculture.