The Green Party has proposed plans to introduce citizens pensions to all pensioners regardless of contribution record from 2016 so no pensioner will live in poverty, according to its manifesto.
Under the new pension system, the party promised to pay £180 to single pensioners and £310 to couples and future increases would be based on inflation or earnings.
The Green Party recognised this would cost £116bn - £26bn more than the existing state pension. In order to fund this, the party proposed to reform private pensions and raise £20bn "by reducing tax and national insurance incentives for private pensions by one half". A further £6bn would be raised by abolishing national insurance upper thresholds.
The party said in its manifesto: "Private pension schemes have failed. The £40bn government subsidy given to private pension schemes in the form of income tax and national insurance relief is huge. The performance of the private pensions industry is dismal - the total paid out in private pensions each year is no more than the subsidy that the government gives the industry. We will begin to reform this."
In addition, the party said it would offer a "new state earnings-related pension scheme". This would invest in public assets such as the railway, renewable energy and the National Grid and projects sponsored by local authorities.
"These assets offer a long-term and predictable rate of return - ideal for pensions - and the pension fund will provide the savings needed to invest in these assets," said the manifesto.
The party said these assets would replace existing pension fund assets, many of which consist of shares in companies whose main assets are "unusable fossil fuel reserves".
It added: "Employers would be obliged to offer and contribute to this scheme, as they are now with stakeholder pensions."
Under the manifesto, pensioners living abroad will also receive the same pension and annual pension increase as those living in the UK.