Sinn Féin has warned that international protection legislation will cause legal aid services to "burst".
The International Protection Bill today passed second stage and immediately went forward to a truncated third - committee - stage in the Dáil, despite the Opposition voting against it proceeding and demanding it get a full committee hearing.
The debate will continue into the night and conclude next week.
Matt Carthy, Sinn Féin's foreign affairs spokesperson, said the legislation is "absolutely rushed" which "makes a mockery" of due process.
"There's very, very good chance that civil legal aid will burst as a result of the additional responsibilities under this act," he warned.
Deputy Carthy said that he "has no confidence whatsoever" that Tusla has the resouces to manage the additional demands it will face.
"I think it is deeply, deeply regrettable that we are not having the detailed scrutiny within the comittee."
"There isn't a chance in hell" that the Government will be in a position this year to comply with either the bill or the EU Migration Pact, he insisted.
Labour TD Alan Kelly said that the legislation will be tested in the courts and will ultimately be reviewed.
He expressed "serious concerns" about whether the bill could be implemented and its legality.
Social Democrats TD Gary Gannon said that Opposition ammendments are not being adequately examined, given the rush in which they are being voted on.
Aontú leader Peadar Tóibín said that the issue of migrants who are crossing into the Republic from Britain must be addressed with the UK government, and cricticised the lack of such details in the Government's approach.
"It's bigger than this bill, five or six times bigger than this bill in term of actual numbers."
Minister for Justice Jim O'Callaghan defended the Government's approach.
When the history of the 21st century is written, migration will be one of the dominant themes, he said, and Ireland needs to ensure its system is up to the challenge.
The legislation must be ready by 12 June, when the EU Migration and Asylum Pact comes into force, he noted.
Minister O'Callaghan promised he would engage with all the ammendments today and next week, which does not necessarily mean he will agree with them.
