The TUC has called on the Government to extend the scope of its pensions Green Paper.
In its response to the consultation, the TUC claims it is not radical enough and is particularly disappointed with the limited proposals aimed at improving women's pensions.
The TUC is set to outline detailed proposals addressing how to improve women's retirement income.
It opposes any move to increase the age staff can start to withdraw their pension from 50 to 55 years-old. It will also fight any increase in retirement age in the public sector from 60 to 65 years-old.
It also calls for greater protection for staff when defined benefit schemes are wound up by employers.
Brendan Barber, TUC general-secretary elect, said: "Only a few of the paper's proposals present difficulties, but the central problem is that the Green Paper is simply not radical enough to deal with the UK's pensions crisis.
"I suspect that many in government know that much more is needed."