One of my teacher mates complains bitterly that some teacher colleagues get an automatic pay rise along with him yet are not performing very well. The structure of teacher's pay needs to be linked to performance.
Teachers' pay scales are quite complex nowadays. As I understand it, there is a basic scale which has six points, and annual progression through these is more or less automatic, which is what Duke's teacher mate is referring to, I guess. However, progression beyond the top of that scale is performance related - there's a upper scale, and some teachers can also be promoted to be 'Advanced Skills Teachers', which I believe means they do some coaching/ mentoring of other teachers as well.
Maybe Duke's teacher mate or someone else can tell us how schools assess the performance of teachers on the upper scales? I worked in colleges before I retired, and there lecturers were observed in classes by the principal or a head of department, but obviously any half-way competent teacher can produce one decent lesson if they have to - what really counts is the ability to be consistently inspiring day after day!
Maybe schools could set targets to individual teachers for exam passes, but if they did I'm not sure I would place too much reliance on the outcome. Targets are notoriously open to being fiddled, and can also produce unintended consequences.