(Sorry, the link has somehow disappeared.) Is anybody really surprised by the fact that two thirds of Comprehensive School teachers don't have degrees in the subject that they teach? Or that thousands of student teachers last year failed basic literacy and numeracy tests that they took as part of their course (and then were allowed to resit as many times as necessary)?
Whilst there are still some brilliant people going into State Education, the average ability of new trainees is in terminal decline, due to the simple fact that teaching is no longer very appealing to Bright Young Things who know exactly how bad Inner City Comprehensives are, and have no desire to have anything to do with them. This only leaves the highly devoted and the absolutely hopeless.
Ever worsening conditions of employment have left us desperate. The only qualification necessary for a job at St Thickchilds is a pulse.
You can get onto a BEd course nowadays with two poor A Levels and a few years later be stood in front of a group of possibly far cleverer kids trying to learn for their own exams. I encountered dozens of 'teachers' throughout my career who had little grasp of the subject they were attempting to teach.
My opinion is that it's the working conditions that are the problem, more so than the pay.
Say you were given a choice. On the one hand, you can have a nice, clean graffiti-free classroom, strict, properly enforced school rules (which would result in a massive decrease in poor behaviour from both children and parents). No more silly forms to fill in, targets to make up and a more sensible curriculum. OR you can have a pay rise. How much would you want before it became more desirable than the first option?