It is the duty of all officers mentioned above to reduce the number of deputies and assistants and/or the salaries paid them when it can be reasonably done. The court or judge having jurisdiction may, on motion of the county mayor, and upon reasonable notice to the officer in whose office the deputies or assistants to be affected are, have a hearing of such motion in term or in vacation, at chambers, and may reduce the number of deputies or assistants and/or the salaries paid any one (1) or more when the public good justifies.