They are of course afraid of strikes being called by the Commie Pinko Homo Feminista Slut and Bastard teaching unions.
In any case, there is no one available to teach children to that standard any more in dumbed down Slut and Bastard Paedo Britain.
The best thing to do with the teaching unions is to pass a law requiring that the unions remove members who
- are illegitimate
- have illegitimate children
There is also the Jeremy Clarkson Solution of shooting strikers in front of their illegitimate children.