But whether the administration of justice be so contrived as to defray its own expense, or whether the judges be maintained by fixed salaries paid to them from some other fund, it does not seen necessary that the person or persons entrusted with the executive power should be charged with the management of that fund, or with the payment of those salaries. That fund might arise from the rent of landed estates, the management of each estate being entrusted to the particular court which was to be maintained by it. That fund might arise even from the interest of a sum of money, the lending out of which might, in the same manner, be entrusted to the court which was to be maintained by it. A part, though indeed but a small part of the salary of the judges of the court of session in Scotland, arises from the interest of a sum of money. The necessary instability of such a fund seems, however, to render it an improper one for the maintenance of an institution which ought to last for ever.
The separation of the judicial from the executive power, seems originally to have arisen from the increasing business of the society, in consequence of its increasing improvement. The administration of justice became so laborious and so complicated a duty, as to require the undivided attention of the person to whom it was entrusted. The person entrusted with the executive power, not having leisure to attend to the decision of private causes himself, a deputy was appointed to decide them in his stead. In the progress of the Roman greatness, the consul was too much occupied with the political affairs of the state, to attend to the administration of justice. A praetor, therefore, was appointed to administer it in his stead. In the progress of the European monarchies, which were founded upon the ruins of the Roman empire, the sovereigns and the great lords came universally to consider the administration of justice as an office both too laborious and too ignoble for them to execute in their own persons. They universally, therefore, discharged themselves of it, by appointing a deputy, bailiff or judge.