Sharon mentioned she can't work as she'd like to because of arthritis. DWP assessor said "Well, PIP isn't designed to cover loss of earnings" which is perverse in the extreme, implying that Sharon saw PIP as a commercial safety net, rather than as a benefit she deserves to mitigate impacts & costs.
Sharon has a biology degree and a five year doctorate in medicine, for context. She's not a chancer. She's often fatigued - not dissimilarly to ME/CFS - and misses out on lots of life.