Chancellor George Osborne confirmed the government will implement a single-tier state pension.
Government failure to reveal plans for a £140 universal state pension has weakened the coalition's Pensions Bill, leaving it like "Hamlet without the prince", Baroness Hollis says.
The government published its Pensions Bill today, covering proposed changes to auto-enrolment.
Labour has slammed the coalition government for dithering over plans to introduce a flat rate state pension after it shelved the launch of a consultation last year.
Pensions minister Steve Webb will face a barrage of questions on pension changes next week as MPs return to parliament.
More than 10 million people will see their state second pension hit by the Consumer Price Index switch by the end of this parliament, the government says.
A universal basic state pension could threaten the contributory principle of the welfare state, Labour says.
The government's decision to switch pension indexation to the Consumer Prices Index is "policy on the hoof", the Labour pensions spokeswoman says.
Shadow pensions minister Rachel Reeves on auto-enrolment
Labour pensions spokeswoman Rachel Reeves has warned the auto-enrolment review threatens to ‘unravel the consensus' over pension reform.