Not exactly on the subject but seeing as we're talking about education, a problem we have locally is with an academy poaching good teachers. They can set their own pay scales and this one particular academy is owned by one of the local universities and has had around £10million pumped into it, including a large rebuild of part of the school. The school which my boys go to has lost a number of excellent teachers to this academy. T had the better of it I suppose as he had the advantage of being taught by these teachers for longer than J did. J now seems to have a succession of NQTs who stay a year and then leave, one of whom was particularly useless and I requested a move from her class for him last term. The school moved him but it was a pointless exercise in the end as she only lasted the one term and left at Christmas (though I very much doubt she went to the academy!!).
I remember that when I was at school (and my old school is now the new academy that I'm talking about) it was very rare for a teacher to leave. It was either for maternity leave or retirement but last Summer 27 teachers left T & J's school and every end of term there's a list of outgoing and incoming staff in the newsletter.