> Funding in many schools isn't there now for specialists to do these roles.... because teachers wanted to earn more after inflation, so cuts made - more responsibilites to teachers.

This seems as though you're implying that it's the greedy teacher's fault that our school systems shove ever-increasing responsibilities upon them. As if the total pot of money in the system is a fixed, immovable sum, and so that if a teacher wants a raise it must mean that something elsewhere has to give.

Is there any shred of evidence to support that kind of thinking, though? We can quibble about salaries and outlier districts all day long if you want, but fundamentally it's not like teachers are the most highly-paid group of workers out there. And governments manage to find money to increase funding to other systems year after year (the police, for example).