WTH has happened to our education system.
There was a definite issue when staffing payment switched from the councils to individual schools. When I started teaching, heads would interview and appoint the best person for the job, whether they were M2 or 30 years in and the county council paid salaries.
At some point this changed and heads had the whole budget. When this started to be squeezed, heads were forced to hire cheap teachers. Then, they started to target expensive teachers to make them leave.
It feels like this kick started things.
Michael Gove did a lot of damage as well. Curriculum mainly, but scrapping pay portability for teachers was very bad for the profession.