Much was made in the media this past week of mental health at work in the UK. Reports suggested that an estimated 300,000 leave work annually in the UK economy because of their own mental health issues. https://www.gov.uk/government/publications/thriving-at-work-a-review-of-mental-health-and-employers
I was one of five people who left their jobs at a 'modern' UK midlands university because of the mental health of two managers. We worked in a psychology department. Four of us were counselling psychologists. Our manager was also a counselling psychologist who had been appointed to her post as manager by her soon-to-be husband - their relationship at the time of her appointment was unknown to the so-called HR department. He is widely understood to be a functional psychopath and she a destructive narcissist. Our complaints about them, including defrauding the university of its funds fell on deaf ears. ACAS were called in but it was misled. The lawyers supported the institution in making out of court settlements amounting to not very much plus a gagging order. Within two years of the group of five's departure, the miscreants also left and their marital relationship collapsed.
It was an utterly toxic environment managed by highly paid incompetents, most of whom are still in post on six-figure salaries.
Isn't amazing to think that the difference in productivity of UK plc and its peers may be down to mental health issues. In our case it was the madness of managers which drove people out of their jobs.