Unfortunately, decision makers seem convinced that a large percentage of the public is delusional, or a reasonable facsimile.
Why otherwise would they have patients routinely shunted over to CBT after an initial misdiagnosis of MUS?
"Misdiagnosis on a grand scale?" outlines the significant problem of misdiagnosis. Referrals were examined for two "cfs" clinics: 40% were eventually re-diagnosed without "cfs" - many had other biomedical issues. In the second study 54% of people diagnosed with "cfs" had other health issues; mainly biomedcial:
http://www.meresearch.org.uk/information/publications/misdiagnosis-on-a-grand-scale/
ETA: When will authorities learn that allowing MUS diagnoses on a grand scale, costs more in healthcare funds?