The Association of Superannuation Funds of Australia (ASFA) has called on the government to release the findingd of the Henry review immediately as a series of leaks continues to cause concerns in the industry.

"I think with so many leaks and so much speculation and with clearly some sources indicating that they've seen the review, it's time for the government to issue it so that we can all prepare our response," ASFA chief executive Pauline Vamos said.

Over the weekend, The Sydney Morning Herald (SMH) published an article outlining the recommendations of the final report of the review that is due to be released by the Treasurer shortly.

According to the article, it was unlikely that there would be a recommendation that the superannuation guarantee be lifted from 9 per cent to 12 per cent.

Commenting on the article, Vamos said this did not mean the government was not interested in an increase at some point.

"(Minister for Superannuation) Chris Bowen particularly is aware that people want more than an adequate retirement," she said.

"However, we are disappointed because we believe this is short sighted and the government can't say on one day that we've got an ageing population and we've all got to save for our retirement and then not have clear incentives for people to do so."

The SMH article also outlined that superannuation would keep its tax-preferred status, but the benefits would be more evenly spread so that lower-income earners would benefit.

Vamos said the middle-income earners, rather than low-income earners, were the ones that were being lost in the system.

"It is very important that we recognise that this group of people make up the bulk of the population and they're the ones that pay all the tax, so it's vital that we look after them," she said.

"We also have to encourage them to self-fund for retirement and I think the government is missing that."

The federal government has been reviewing the Henry review's findings since December.