FGD135 is correct.
We MUST remove the ability for management to misrepresent the pay claims.
At the very least, drop/'rejig' the payload band tables and remove any of the staff travel claims which management say are inflating the figures.
Leave the 2.5%, which at current CPI rates seems to be a 0.5% to 1% pay cut each year in real terms.
A Job Security/Scope Clause is NOT going to come cheap!