By Paul Lewis
BBC Radio 4's Money Box
Many pensioners will not see the reforms to the state pension which the government is expected to announce on 22 May, Mervyn Kohler of Help the Aged has told BBC Radio 4's Money Box.
Mr Kohler is concerned about the six year delay before reform
"We want to see the process given a lot more urgency. Delaying the start of reforming our pension system by six years is not going to help today's pensioners, a great many of whom will never see it," he said.
Mr Kohler was responding to comments by the chairman of the Pensions Commission Lord Turner on what was known of the government's plans.
Reacting to proposals to raise the basic state pension in line with earnings from 2012, Lord Turner told the programme: "We said that a short delay beyond 2010 would not seriously undermine the overall direction of the proposed reform package, but a delay of five years to 2015 would.
"So if we are really talking about 2012, that might represent a reasonable compromise between the need to limit the spread of means-testing versus concerns about public finance."
But Alison O'Connell, director of the Pensions Policy Institute, said the government's leaked plans would leave out many pensioners who needed help.
"We've heard that instead of having to have 39 years contributions through work or credits gained though caring responsibilities, women will only need 30.
"That would get more women into the system. But the big question is how to make it work for women over 60 now.
"Younger women are working more than the older generation so can we make the changes retrospective so they apply to older women now?"
She confirmed that sex discrimination rules meant that any change to the contributions conditions for state pension would have to apply to men as well.
And she warned that the plans to reform pensions could still leave more than half of all pensioners dependent on means-tested benefits.
"Turner's proposals were to limit the future spread of the means test, keep it where it is now, around 50% of pensioners entitled to Pension Credit," she said.
"If the government is not going to do the full Turner proposals then there will be even more people eligible for pension credit in future.
"That's the key measure we will be looking out for to see what the actual outcome of the proposals will be."
Mervyn Kohler agreed that cutting the reliance on means-testing was the key. Evidence out on Thursday showed millions of pensioners did not claim the Pension Credit they could: "The figures show that one third of pensioners entitled to means-tested benefits are not claiming them," he said.
"There is something well in excess of £4bn for pensioners that is available that is not being claimed."
BBC Radio 4's Money Box was broadcast on Saturday, 13 May 2006 at 1204 BST.
It was repeated on Sunday, 14 May 2006 at 2102 BST.