Aontú leader Peader Tóibín has said he has "no confidence" in the ability of the Government to deliver infrastructure, including the €3 billion investment announced by Minister for Finance Jack Chambers.
He contended the Government has a "big problem" when it comes to critical infrastructure, citing the ongoing delays at the National Children's Hospital where, he said, €2.2 billion had been spent but not a single child had been treated.
Mr Tóibín cited other examples of failures by the Government, including the €300 million spent on Metro North with "not a shovel in the ground" and the Midleton flood defences which were promised from 2015 but for which no planning application has been submitted yet.
He was speaking at the party's think-in in Co Cavan, ahead of the Dáil returning next week.
The Aontú leader said there was an urgent need for accountability at the top.
He argued the current Government is "an accountability-free zone" and the Oireachtas bike shelter debacle was "a microcosm of that".
Deputy Tóibín said that "nobody is ever held to account" by the Coalition, but his party would ensure senior civil servants and politicians who make "massive loses" should lose their jobs.
He said: "There has to be a cost for these mistakes.
"If not, we're cursed to wake up to this kind of stuff on a daily basis."
The Aontú leader was highly critical of all three of the Coalition parties on the issue of childcare provision, claiming that the Government's plans are putting providers out of business.
He said the Government suffered from what he termed a "practicality chasm" given 180 childcare providers have closed in past 18 months.
Deputy Tóibín said parents are putting down the name of newborn babies in an attempt to secure a place and this proved the need for a "significant increase in investment" to ensure families can get adequate places "at a decent price".
The party's poll topping Co Cavan Councillor Sarah O'Reilly said there was an urgent need for regional development as Ireland was "turning into a city state".
Her party leader said there was an urgent requirement for a new international city in Ireland which would act as a "critical counterbalance" to the capital.
Mr Tóibín said: "Other countries have done this.
"They have selected one location in another part of their country.
"They front-loaded infrastructure into that space ... We need some of that ambition in the Irish political system."
