Performance related pay for teachers does not exist in the same way as it does in industry. Not by far. It is still far more difficult to be fired for incompentence in teaching than it is in any industry job.
Yes ... once you work out the average time spent doing other things you get to a figure that WITCH gave ... and yes, one of the reasons people in public sector jobs is down to the perks which balance out the wages being slightly below 'industry'. Performance related pay ... it does exist. Competency procedures for crap teachers / HoDs ... it is there. There was a major change in performance reviews last year making it easier for schools to get rid of the dross, but it puts a great deal of pressure on the senior leaders in the school to turn a teacher around before they get to that stage.
Most times, i'm sure you will agree, that technology doesn't work is down to the teachers not choosing suitable tools for the jobs they wish to do. Every single ICT failure in our school of this type is down to people not bothering to check with me before going out and buying $random software and then demanding it be put on a network they know nothing about.
Where does the teacher fit in with this? Technology is not seamless. It breaks ... it is often not fit for purpose and has to be redesigned ... it relies on too many different factors at times. The people that end up dealing with the grief it can generate are the teachers. Reports not saving properly ... you will just have to type them in again ... for a third time. The grade you put in does not match what the parent can see? You will have to ring them and give them the right information ...
From what I've seen of teachers, I would say that many teachers only seem to have a hard time due to their own faults. I am forever seeing teachers stressed over the most pointless of little things, or stressed over problems they created by not having done their jobs properly in the first place.
Teachers do have a hard time ... *so do we* ... perhaps if we were more supportive of the teachers they would be more supportive of our claims to better pay and conditions (and for what it is worth, the LA pension scheme is actually going to work out slightly better for me than a teacher's one would!)