David Cameron has pledged to keep the state pension rising by a minimum of 2.5% per year if the Conservatives win the 2015 General Election.
The Prime Minister said his party would keep the 'triple lock' system, meaning the state pension goes up by whichever is higher - inflation, wages or 2.5%.
It would keep increasing at this rate until 2020 if the Conservatives seize power.
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Mr Cameron told the BBC in a television interview: "I want people when they reach retirement to know that they can have dignity and security in their old age.
"People who have worked hard, who have done the right thing, who have provided for their families, they should then know they will get a decent state pension and they don't have to worry about it lagging behind prices or earnings and I think that's the right choice for the country."
Labour has said it backs the triple lock in principle.