There shall be a Treasury Department, consisting of a Comptroller chosen by the qualified electors of the State, who shall receive such salary as may be fixed by law; and a Treasurer, to be appointed on joint ballot by the two Houses of the Legislature at each regular session in which begins the term of the Governor, who shall receive such salary as may be fixed by law. The terms of office of the Comptroller and Treasurer shall be for four years, and until their successors shall qualify; and neither of the officers shall be allowed, or receive any fees, commissions or perquisites of any kind in addition to his salary for the performance of any duty or services whatsoever. In case of a vacancy in the office of the Comptroller by death or otherwise, the Governor, by and with the advice and consent of the Senate, shall fill such vacancy by appointment, to continue until another election and until the qualification of the successor. In case of a vacancy in the office of the Treasurer by death or otherwise, the Deputy Treasurer shall act as Treasurer until the next regular or extraordinary session of the Legislature following the creation of the vacancy, whereupon the Legislature shall choose a successor to serve for the duration of the unexpired term of office. The Comptroller and the Treasurer shall keep their offices at the seat of government, and shall take such oaths and enter into such bonds for the faithful discharge of their duties as are now or may hereafter be prescribed by law.