.... but it is a requirement for a teacher to be a graduate with an additional post-graduate qualification, neither of which apply to the police or nursing (where training is given on the job, not required in advance of employment, too).
Perhaps a better comparison would be with engineering (average £44k) or GPs?
Personally, I'm in support of the teachers since the salaries are not compatible with other graduate professions, but not in support of strike action.
College lecturers are also on strike today, a fact hardly anyone has noticed (well, the students are adults and many have just gone to the pub etc.). This is because the Government is mixing more and more school-age kids into Colleges where staff are paid on average 6% less than the teachers.