All clerks, appraisers, investigators and other persons required to assist any register of wills, in any county of the Commonwealth, in collecting and paying over inheritance taxes shall be appointed and their compensation fixed by the Secretary of Revenue, and, upon his approval and order, shall be paid out of the said taxes by the Department of Revenue, together with other necessary expenses incident to the collection of such taxes, including the payment of the cost of the premium on bonds filed by registers with the Department of Revenue.
72 P.S. § 1710.2