Former Financial Regulator Patrick Neary and former head of the Central Bank John Hurley have been called to appear before the Banking Inquiry next month.
The two are among the second tranche of witnesses agreed for the 'Nexus' phase of the inquiry's work, which is focused on bank practices, regulation systems and crisis management.
This round of hearings will begin on Wednesday 22 April.
Mr Neary retired as financial regulator in January 2009, while Mr Hurley left his role in late 2009 having served as head of the Central Bank since 2002.
Inquiry chairman Ciarán Lynch also confirmed that former European Central Bank president Jean-Claude Trichet had agreed to "engage" with the committee when he visits Ireland next month.
Mr Trichet is due to address a meeting of the Institute of International and European Affairs in Dublin on 30 April.
"We will now engage with Mr Trichet and the IIEA to examine the options, details and modality of engagement to hear from Mr Trichet and how this engagement may further the work of the Inquiry and how the information provided may be available as evidence", Mr Lynch said.
Other figures due to appear before the inquiry from next month include AIB chief executive David Duffy, along with former head Michael Buckley.
Bank of Ireland chief executive Richie Boucher has also been asked to attend, as has former Ulster Bank chief economist Pat McArdle.
Academic says inquiry should examine tax reliefs
Earlier an academic told the banking inquiry that reliance on political donations from a particular sector may facilitate a perception of undue influence over policy making.
Dr Elaine Byrne said this was undue, but not illegal, influence by vested interests over regulation and policy making.
In her analysis of disclosed political donations between 1997 and 2007, Fianna Fáil got the largest amount of €1.8m.
This was followed by Sinn Féin on €1.3m, Labour on nearly €400,000 and Fine Gael nearly €200,000.
Of Fianna Fáil's disclosed donations, the largest share, 35%, came from property and construction interests, 20% from business interests, the remainder from individuals, hotels, motor, food and drink, banks and others.
Dr Byrne said it was impossible to present a complete picture of how political parties were financed.
Of the €10.1m spent by parties and candidates in the 2007 general election, €1.3m was disclosed.
Dr Byrne also said the inquiry should consider a list of tax reliefs and incentives granted by government to developers and investors between 1997 and 2007, along with the cost of such incentives.
Tax incentives 'pumped up the balloon'
Former Irish Times environment editor Frank McDonald told the inquiry that an array of lucrative tax incentives pumped up the balloon and there was no public interest justification in leaving them in place for so long.
He said the committee needed to examine why these were continued even though the construction industry was having its biggest, most profitable spree ever.
Mr McDonald said it was perfectly justified to introduce the Section 23 incentive in the late 1980s when the industry was on its knees and desperately needed a lift, but to persist with it when construction was leading the boom was the height of folly.
The government was adding fuel to the fire, stoking an already hot furnace, he stated.
He said the inquiry should ask former ministers for finance of the period precisely why they decided that a range of property-based tax incentives should remain in place, because no public interest could justify such an irrational fiscal policy.
Mr McDonald said that so many were caught up in the bubble that they could not see it in perspective.
It became normal that fairly average semi-detached houses could be worth a million euro or more, or that Dublin property prices were higher than Paris in terms of the cost per square metre.
He said that was why economist Morgan Kelly's warning of an imminent collapse of the property market, published by the Irish Times in December 2006, was regarded by many as "heretical as Martin Luther nailing his demands to the great west door of Wittenberg Cathedral".
The journalist also told the inquiry he had no doubt that corruption lay at the heart of Dublin County Council's most contentious land rezoning decisions.
He said that while the Planning Tribunal was then dealing only with Co Dublin, he had no doubt that there was corruption elsewhere.
Otherwise, he said, decisions made by elected representatives against the advice of planning officials were inexplicable.
He said the political system was based on clientelism - doing individual favours for individual constituents, in effect turning citizens into clients.
He said it was not much of a step to seek political donations in return for performing such services as rezoning a particular parcel of land rather than another parcel.
Mr McDonald also said media became substantially dependent on revenue related to the property and recruitment sectors.
He said the Irish Times' Thursday property supplement was so big at one stage that it was in two sections, with a 12-page opener and a 48-page follow-on.
He said it was a major revenue earner for media, including the Irish Times.
Asked by Fianna Fáil's Marc MacSharry whether the media where cheerleaders for the boom he said that, whatever about the perceptions of being cheerleaders, there were also off-setting critical pieces on how Dublin was developing and the downside of the boom.
He said the revenue stream would not have influenced him or other journalists.
He said a 1994 article he wrote on the phenomenon of shoebox flats took a few months to get into the paper.
He said journalists were regularly entertained by property companies with lunches and launches but he never got tickets for a match.
Mr McDonald said Irish Times journalists could not take junkets from the private sector, trips had to be with Government or State agencies.
Mr McDonald said the Construction Industry Federation and various property developers complained to The Irish Times about the treatment meted out to them, but he said he continued on.
The inquiry has concluded for today.
