The Wealth of Nations by Part 5 Chapter 1 Page 90

only necessary that the judicial should be separated from the executive power, but that it should be rendered as much as possible independent of that power. The judge should not be liable to be removed from his office according to the caprice of that power. The regular the good-will or even upon the good economy payment of his salary should not depend upon of that power.

3. Of the Expense of Public Works and Public Institutions

The third and last duty of the sovereign or commonwealth is that of erecting and maintaining those public institutions and those public works, which, though they may be in the highest degree advantageous to a great society, are, however, of such a nature that the profit could never repay the expense to any individual or small number of individuals, and which it