The risk of improper payments increases in programs with (1) complex criteria for computing payments, (2) a significant volume of transactions, or (3) emphasis on expediting payments.
It's preferred to limit the number of transactions to make the risk reduced. 
mnli hypothesis: It's preferred to limit the number of transactions to make the risk reduced.  premise: The risk of improper payments increases in programs with (1) complex criteria for computing payments, (2) a significant volume of transactions, or (3) emphasis on expediting payments.