The compensation of all city officers provided for by sections 25, 26 and 27 of this Charter, except library trustees, who shall receive no remuneration, shall be by salary to be fixed by the council on the recommendation of the city manager. The council shall also fix the compensation of all other officers and employees on recommendation of the citymanager, except as in this Charter otherwise provided. No officer or employee shall be allowed any fees, perquisites, emoluments, rewards or compensation, aside from the salary or compensation as fixed by the council, but all fees received by him in connection with his official duties shall be paid by him into the city treasury.