The Wealth of Nations by Part 5 Chapter 1 Page 72

seldom be anybody powerful enough to call him to account. When he exercised it by a bailiff, indeed, redress might sometimes be had. If it was for his own benefit only that the bailiff had been guilty of any act of injustice, the sovereign himself might not always be unwilling to punish him, or to oblige him to repair the wrong.

But if it was for the benefit of his sovereign, if it was in order to make court to the person who appointed him and who might prefer him, that he had committed any act of oppression, redress would upon most occasions be as impossible as if the sovereign had committed it himself. In all barbarous governments, accordingly, in all those ancient governments of Europe in particular which were founded upon the ruins of the Roman empire, the administration of justice appears for a long time to have been