Actuaries claim public sector workers will gain from the abolition of contracting out but unions contend it could derail public sector scheme reform.
The overhaul of the state pension system announced today will save the government money in the long term according to Department for Work and Pensions projections.
The single-tier pension will bring an end to state second pension and contracting out, the Department for Work and Pensions has confirmed.
Employers will have temporary powers to change scheme rules without trustee consent, in a bid to protect defined benefit schemes from the cost of abolishing contracting out.
The Department for Work and Pensions has outlined how it will phase individuals with rights under the current state pension system into the new universal system in a white paper.
The government is to review the state pension age every five years in order to keep the retirement age in line with increases in longevity.
People will have to work longer to qualify for a flat-rate state pension under long-delayed proposals published in a white paper this afternoon.
The government said it cannot make any further simplification to guaranteed minimum pension rules in its white paper on the single tier state pension.
The government today unveiled its plan for a single tier state pension after more than a year of delays.
Representatives from the Nortel Networks UK Pension Plan and the Pension Protection Fund have travelled to Canada in a bid to secure more than $2bn (£1.2bn) from an international mediation.