That's the case for averaging out the salaries. The problem is attracting new teachers and keeping them beyond the first years. But a person who's already been there for twenty years is not likely to be going elsewhere -- yet those are the very ones whose pay is being boosted, to the detriment of those we really need -- those fresh, idealistic people with a passion for teaching. And not only those who are looking towards retirement so they can collect a pension as well as be rehired back at their old jobs -- for double pay! That's the new gambit in civil service.
Well, yeah - you reward the burnouts who don't give a crap about their jobs and are just looking forward to retirement, at the expense of new teachers, and then I bet they're actually surprised that the average age for teachers is about 147. Rank hath its privileges, after all.