Phlip Booth, editorial director of the Institute of Economic Affairs, said the changes must not result in extra costs for the next generation.
He said: "By proposing that contributions should be varied between members on different levels of earnings it is trying to use an employee benefit as a social engineering tool. Furthermore, the government seems to be centralising the rules regarding public sector pension provision when there is an urgent need for all public sector pay bargaining to be localised.
"There is an urgent need to make the costs of public sector pensions more transparent and to reduce the costs and risks they impose on the next generation."
Read the rest of the article on the FT Adviser website.