It mentions, as a throwaway fact, that "lower retention rates were common among schools with poor Ofsted ratings".
Well yes, of course.
It is one thing to take over, or simply remain long term as the head of, a smoothly running, Outstanding school - no Ofsted, almost certainly a relatively low % of PP and SEN children, almost certainly supportive parents who will have carefully positioned themselves in catchment or got the entry tickets [exam, church attendance, feeder school] for the school, high staff morale, stable or rising rolls so at least stable funding.
It is quite another to be brought in to 'turn a failing school round' - to come in after yet another RI / SM Ofsted, to face falling rolls and falling funding, demoralised staff (with those who teach shortage subjects having already voted with their feet and left), a high percentage of deprived / anti-education / low attaining children, almost certainly a socio-economically deprived intake (given the statistical link between %PP and low Ofsted ratings), a high proportion of parents who either don't care or desperately wish their children could go elsewhere, a local reputation as 'the sink school'. And, in many cases, Ofsted due again in a year, looking for substantial improvements. Risk of being taken over by a / another MAT rerquiring endless political negotiating. Constant visits from 'experts' - MAT management or LA.
Is it any wonder that the second type of head leaves either after the first Ofsted, maybe the second, if they're very tough, the third within 3 years? How many go on to other headships / these 'highly paid jobs', and how many spend time recovering, or not recovering, from stress-induced mental illness / are dead?
Until we properly support new heads going into challenging schools - by significantly delaying Ofsted inspections, by providing consistent, long term extra funding, by constant counselling support, by providing a group of supportive local peers who have been there, who can help without judging - of course heads going into such schools will leave, fall ill, or die, within a very small number of years.