They say it risks a return to austerity
The signatories - Tate Donnelly, Julie O'Donoghue, Sean McCabe and Saoirse McHugh - are all from rural constituencies.
They say the carbon tax proposal as it stands would particularly affect rural and low-income families
Leaders of the youth wing of Fine Gael and Fianna Fail have also rejected the programme and any plans for coalition with one another
Tate Donnelly says it contains no new ideas to solve the housing crisis:
