I'd say it is more appropriate to compare to what actual salaries have been doing than comparing to (often used RPI).
There was the post Brexit/Covid squeeze in the labour markets, but other than that they are falling. Unless you work for an oil company with increasing revenues, its not possible to pay people in line with inflation. Unless you want the price of everything to increase 10% again over the next year.
The boom of the 2000s are a long distant memory.
The civil service in general have had minimal wage growth since austerity starter, and I can understand some form of catchup, but it needs to be more general (even if it is smaller as a consequence) rather than favouring a particular part of the civil service.