It's not surprising that Sunak wants to use unqualified people to diagnose whether someone is fit for work, afterall, they've been using unqualified people to fill ministerial roles for years!!!
The last time the Tories used non qualified people to make assessments of working people, it didn't go well.
https://www.theguardian.com/society/2013/dec/05/call-halt-fitness-for-work-test-disabled