The governing authorities of the various counties shall have the authority to expend county funds for the purpose of employing such additional temporary personnel and providing such equipment and supplies as in their respective judgments shall be necessary and advisable, in order that such personnel and equipment might assist any county officer, official, or department in discharging his or its duties and responsibilities in an efficient and orderly fashion. Nothing contained within this Code section shall be construed so as to abrogate the authority of such officers and officials to select the personnel who shall be employed within their respective offices and departments.