Yep, this.
I know someone who uses their PIP for private hydrotherapy sessions. Cue cries of people saying they have to pay to go swimming, so why is the taxpayer funding her to do similar.
Another uses PIP to get a wash and blow dry once a week as she can not wash her own hair. Cries of people saying they can't afford to go to the hairdresser weekly, so why are they paying for her to do so. Imagine being jealous of someone who can't wash their own hair. FFS.
So on and so forth, you get the drift...
But if you are disabled and are seen out and about trying your best, maybe getting some treatment or working on an exercise regime that will help... you get accused of swinging the lead.
I think the issue here with the chap in the article is that he genuinely did improve health wise, and did not report it. However, is there a way to report positive changes to the DWP and have a reassessment? I remember the program that was on BBC about benefit claimants, and one chap said his health had improved and he wanted to come off benefits, but was told he had to wait until he was reassessed.