Greens leader Richard Di Natale says he would have supported the Abbott government's proposed pension changes regardless of the concession he won from them to have a formal review of the retirement income system.

The Greens struck a deal with the Abbott government this week that will see the government's proposed changes to the pensions asset test passed by Parliament, delivering $2.4 billion in budget savings over four years.

News Greens leader Richard Di Natale: "If push came to shove, ultimately the policy stood on its own. I was staggered that Labor didn't support it." Credit:Jay Cronan

As part of the deal, the Abbott government agreed to give special consideration to retirement incomes in its tax white paper, and the Greens say that means the government will have to consider superannuation tax concessions in its tax review.

Labor has attacked the deal, claiming the Greens were "dudded" because the government has no intention of making any changes to superannuation.