Fianna Fail leader Micheal Martin has committed his party to opposing the Home Repossessions Bill which will be introduced in the Dail next week.
At his party's ard fheis, Mr Martin said the "human impact" of household and mortgage debt is "an urgent national crisis demanding radical action''.
And he added that in a scenario such as this "it is wrong for this Government to make it easy for the banks to repossess family homes and that is why we will oppose its Home Repossession Bill next week in the Dail".
Mr Martin also slammed the proposed property tax for being "about as unfair as it could be. It makes no provision whatsoever for the ability of people to pay. It actively discriminates against many urban areas."
He also said that "still, no one in Government has explained why families who cannot even pay their mortgage are now being asked to pay this property tax".
Mr Martin also claimed at the ard fheis that the Government was forcing middle Ireland and the private sector to shoulder the entire burden of Ireland's economic crisis.
He said: "The Government is actively placing the burden of recovery on to those who are feeling the most pressure''.
Mr Martin also said that the "€1bn extra per year is available because of a cut in interest rates and a rescheduling of debt'' and added "the domestic economy is crying out for some relief and now the opportunity is there to deliver it. What's more, it can be done while fully meeting Ireland's debt targets."
The majority of jobs, he said, "in our society are provided by people running small businesses and it is they who are feeling the most pressure''.
And he warned: "A fairer recovery which delivers jobs to all parts of the country can only come about if small businesses are helped to prosper.''
Mr Martin slammed the ongoing claim by the Government that "the plan is working".
Citing the scenario where "unemployment is up, mortgage arrears have doubled and vital services are disappearing'' he asked: "If that's how their plan looks when it's working, what would it look like if it wasn't?''