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While it might be considered that countries using the services of an expert should pay the costs , this might be a disincentive for some countries to making use of such facilities and in situations in which both parties to a dispute had both agreed to the use of a particular expert , one would not wish to exacerbate tensions by differences over who should pay . The University is constantly struggling with who should pay for what services . The debate is over not only whether more oversight of power plants is needed , but also over who should pay for it . The issue of who should pay for special services needed for VR clients with disabilities who enroll in postsecondary courses has been the subject of considerable debate since the passage of the ( ADA ) in 1990 .