Actually, truth be known, a teacher of 20 years is probably going to be reduced in staff so they can hire one with less than five years and show the public how much money they saved in taxes which pay salaries.
The fact is seniority does count in teaching or coaching salaries. Are all teachers fired or let go once they reach a certain age or time of employment? No, none at my high school ever were. Yes it does happen but that was not my arguement.