Social Democrats TD Catherine Murphy has called for major change to stop what she said is a “fragmented approach”.

She repeatedly raised the sale of Siteserv to businessman Denis O’Brien which lead to the establishment of the state commission of investigation that is also looking into 36 other company sales by IBRC between January 2009 and February 2013.

However, it has been reported that Mr Justice Brian Cregan’s interim report states that evidence cannot be gathered from key bodies including the Central Bank and the Irish Stock Exchange.

Ms Murphy said previous work done by the law reform commission needs to be revisited.

“We have a fragmented approach with different agencies doing different things, without a co-ordinating role and, in fact, Social Democrats will be publishing a document tomorrow precisely to deal with that point,” she said.

Ms Murphy added that tight terms of reference and measures containing costs have to be introduced.

“There is no such thing as absolute rights, rights are always supposed to be balanced against the common good and that’s where I have a real difficulty with this,” she said on RTÉ’s The Week in Politics. “When I was raising this I didn’t want it to be complex, I made that point that I didn’t want it to be complicated.”

Tánaiste Joan Burton said the Government is awaiting this interim report which she expects this week.

“The judge has raised a number of very very important issues, he is due to report back to the Taoiseach,” she said. “We are absolutely determined to see that the judge gets every support that he requires in order to carry out the inquiries.”

Michael McGrath, Fianna Fáil finance spokesman, said the Government has failed to adequately address serious questions regarding its handling of the IBRC inquiry.

“We all operated on the basis that public interest would override here and this inquiry could cut through individual banking transactions, something that the banking inquiry for example has been unable to do,” said Mr McGrath.

“You really have to wonder now whether this inquiry will ever get off the ground.

“You can’t ignore the backdrop to all of this, the Government didn’t want to set up this commission of investigation.”

Mr McGrath said the Department of Finance wrote to Judge Cregan to express concerns as early as August.

“Last week the Taoiseach claimed the Government was unaware of the difficulties facing the inquiry until November,” he said.

Education Minister Jan O’Sullivan admitted: “We all expected and wanted that this would happen quickly, I don’t think anyone welcomes the fact that we now have these questions have been raised.

“This is exactly what we didn’t want to happen and that’s why the original tribunals of inquiry when on and on forever, this is why the commission legislation was brought in and did appear to be working in fairness, it’s there since 2004, we have had a number of investigations that have gone relative quickly and the intention here was to do the same.”