The Minister for Justice is being urged to review a scheme of payments for the victims of the Stardust fire.
The scheme, which was established in February, sees successful applicants receive a €20,000 payment, for "delays in providing truth and justice".
Four hundred and fifty people have applied to the scheme to date, according to the latest figures released by the Department of Justice.
The fire on Valentine's night 1981 in the Stardust nightclub in Artane claimed the lives of 48 young people and injured hundreds of others.
After a long campaign for justice by affected families, a 2024 inquest determined that all 48 had died as a result of unlawful killing.
The Government subsequently made a state apology in the Dáil to the survivors and bereaved.
However, some of the worst affected survivors of the fire claim the scheme is "an insult" as it treats those who were in the nightclub for a short period of time on that fateful night the same as those who suffered life altering injuries.
They argue that a flat rate of payment, rather than a sliding scale, was announced without consultation and constitued a broken promise.
State apology 'sullied' - survivor
"The fact of the matter was there was a commitment to sit with us and discuss this, but that didn't happen. I learned news about this scheme from the media.
"This has sullied the State apology by not sticking to what was said and what was agreed," said prominent survivor Jimmy Fitzpatrick.
Mr. Fitzpatrick, who lost his fingers in the blaze and sustained almost complete third degree burns over his entire body, was speaking after a presentation by Stardust representatives to TDs and Senators at Leinster House this afternoon.
He claims the Government gave a commitment that the most seriously injured and traumatised survivors would be treated "exceptionally" by the scheme.
Mr Fitzpatrick said he has been caused "nothing but stress" since it emerged the scheme would be a "one-size-fits-all" model.
The payments scheme is due to close to applicants in August, with officials saying they are encouraging all those eligible, including those who were in the fire and now living abroad, to apply.
'We are right back at the start' - solicitor
Survivors and bereaved of the disaster are seeking to meet Minister Jim O'Callaghan before then.
A spokesperson for the minister said his department "has commenced the process of contacting those applicants who have completed applications and it is expected that the first payments will be processed shortly".
"Here we are right back at the start. Here we are back where it all began, having to come with the begging bowl out again and ask for simply something that was promised," said solicitor representing some of the victims, Darragh Mackin of Phoenix Law.
The courts are to hear a judicial review challenging the payments scheme later in the Summer.
Sinn Féin leader Mary Lou McDonald called on the Government to urgently address the issue of exceptionality in the scheme.
"There's a huge inequality in not recognizing that you may have been there on the night and you may have left early, or lost your coat or you could have been in circumstances where you suffered life altering, devastating consequences. I just think that must be acknowledged," she said.
Minister O'Callaghan has said the payments were not intended to be compensation for injuries.
"It does not place a significant burden of proof on survivors, nor is it overly bureaucratic, and it is accessible without legal assistance," a department spokesperson said.
