"The bottom line is - we have to change public sector pensions - we simply have to"
actually its not that simple (nothing re pensions ever is) and we don't necessarily "have to", though it is understandably attractive to government at this time
BBC - Stephanomics: (Some of) the truth about public-sector pensions
Having said that if the "hit" is merely an extra 2.5% of income that's been rumoured I'd be inclined to take it, and keep quiet, still a far better deal than you'd get in the private sector