You are clearly not a scientist. Although there will always be such things going on and you will read about them in such places as this, you would expect this "background level" to be reported fairly consistently. As it is, there have been an astonishing increase in the reporting of such things. That is very strong evidence of a very real increase in the misuse of the capability procedure. The fact that it seems almost all of these teachers have been expensive, points secondarily to the fact that it is very often done to save money. We are now in a situation where there is a shortage of teachers and no one seems to want to do the job anymore. Plenty more are stressed to the point of physical and mental illness due to the workload and no doubt the pressure from management and the constant worry that you can now lose your job in short order. Not great really, is it?