Wash. Rev. Code § 74.64.030
It is the intent of the legislature that the savings achieved through this chapter shall more than cover the cost of implementation and administration. Therefore, to the extent possible, technology services used in carrying out this chapter must be secured using the savings generated by the program, whereby the state's only direct cost will be funded through the actual savings achieved. Further, to enable this model, reimbursement to the contractor may be contracted on the basis of a percentage of achieved savings model, a per beneficiary per month model, a per transaction model, a case-rate model, or any blended model of the aforementioned methodologies. Reimbursement models with the contractor may include performance guarantees of the contractor to ensure savings identified exceeds [exceed] program costs.
RCW 74.64.030