For any failure on the part of any tax collector to make reports or to pay over any money as required by law, the tax collector shall forfeit for every week’s delay one-fifth of his or her commissions, and if the delay extends beyond 30 days he or she shall forfeit all commissions on all amounts to which such failure applies, and all future commissions upon all collections to be made; provided, that the Department of Revenue, for good cause shown, may suspend the force and operation of this section with regard to such defaulting collector.