I didn't bring inflation into it as that wasn't asked, so the pay drop didn't happen but clearly with inflation yes then that would be the case...
Either way we have tighten, like most household the purse strings based on earnings, public sector jobs have far greater benefits than private.. great pensions and holidays sick schemes to help with hangovers 
Any teacher who has not been in receipt of a pay increase via incremental progression or via an additional teaching allowance for other responsibilities has experienced the following decrease in pay and all teachers are affected by pension changes:
1. A pay freeze during 3/5 out of the last 5 years and then only a 1% pay increase against official inflation at a higher rate so a considerable effective pay decrease in real terms.
2. An increase in National Insurance payments since April 2016 as a 'contracted in' charge replaced the old 'contracted out' rate to take account of the serious decrease in future pension payments.
3. An increase in the percentage of pay taken for pension contributions which increases as your salary increases. % of pay taken for pension payments has increased from 6% to almost 7% for lower earners up to nearly 12% of gross salary payment for the highest paid teachers.
4. An increase in the National Pension Age to 67 from 60 for the vast majority of teachers which means that they cannot access their pensions without an actuarial reduction of 5% per year for every year it is taken below 67.
5. A removal from the final salary pension scheme and transfer to the average salary scheme which greatly reduces the pension available even when supplemented by the state pension as available by contracted in National Insurance payments. affects all teacher who were younger than 50 on 1st April 2012.
6. No tax free lump sum along with the pension at retirement unless you commute a significant part of the annual pension.
So, every teacher has had a significant actual pay reduction, a significant real pay reduction and a major erosion of their expected pension payments when they can retire as 67 year olds, although that will increase over the next 20 years.