The pensions group has existed since the mid-nineties, and consisted of the parties that then launched a compromise on pension policy, the Greens were opposed to the plans at the time, and therefore not part of the group.
However, the ruling Social Democrats recently invited their government coalition partners, the Greens, to join the pensions group, something that upset the other parties. When the group convened in parliament and a Green Party representative was there, the four Alliance representatives walked out.
"I don't see how they can be a part of the group under any circumstances," the Centre Party's Solveig Zander says.
Social Democratic Minister for Social Insurance Annika Strandhäll says she will now try to talk to the opposition, saying it is important that the Greens join the group as they are now part of the government and have now said they support the pensions agreement from the 1990's.