Sections 325.01 to 325.13, 325.16, 325.17, 325.20, and 325.27 to 325.32 of the Revised Code shall not make a county, or an officer thereof, liable to any of the officers named in such sections, or his deputies, assistants, clerks, bookkeepers, or other employees, for the payment of compensation in excess of the amount authorized, or except in the manner provided by such sections.