Section 3. The salary of the Secretary of the Senate shall be five thousand dollars per annum; the salary of the page to the President shall be three dollars per diem during sessions of the Legislature, also mileage at the same rate as is now paid to the page to the President pro tempore; and all other officers and employes herein authorized shall be paid the same compensation and mileage, for sessions and as returning officers, as is now paid to similar officers.