As a Civil Servant of over 30 years standing l utterly and completely object to this post. HMT always considered their contributions to our pension as part of our overall remuneration and reduced payrises accordingly. The rationale behind that was had they actually paid us the additional pay and taken contributions then pension entitlements would have risen accordingly.Long time Civil Servant here .
I had my pension scheme changed by my employer in 2005 , from a final salary scheme to a career average scheme.
The reason for the change was that under the final salary scheme I had paid NO contributions to my pension (Classic Scheme_ over the previous 26 1/2 years and it would cost the Government a fortune in unfunded pension schemes.
They brought in a new Pension Scheme called Alpha which means I have to contribute to my pension of 4.6% of my gross salary - my union PCS objected to this - I saw this as fair because I have had 26 1/2 years not contributing.
Following the McCloud Judgment the 6 years I have paid into the Alpha Scheme I have a choice of keeping it in Alpha (which is a better scheme as it accrues at 1/60th instead of 1/80th in the Classic).
Just because your Union objects to the change doesn`t mean the change is wrong.
I note that you coincidentally do not mention that Classic pays out at age 60 whereas Alpha is state pension age. There were several intermediate stages (the option of Classic + or Premium and then Nuvos) too. I was forced to move into Alpha. All of that will be moved to Classic and l will be taking my pension at age 60.