The Tánaiste Leo Varadkar says he believes the Government will run its full-term, and Sinn Féin won't be in power 'this year, next year or the year after'.
He was speaking after the coalition survived a confidence motion in the Dáil on Tuesday by 85 to 66.
Independents Joe McHugh, Marc MacSharry, Cathal Berry, Peter Fitzpatrick, Michael Lowry and Sean Canney voted with the Government.
Mr Varadkar told The Hard Shoulder the Dáil motion 'backfired' on the opposition party.
"We more than survived it - we demonstrated that we had a clear working majority in the Dáil.
"And if Sinn Féin hadn't refused Bernard Durkan a pair - he's sick with COVID at the moment - we would have won it by 20 votes.
"So that's a really substantial margin: overall majority governments often don't win confidence votes by that margin.
"So I think it backfired on Sinn Féin.
"I think they wanted us to go into the summer break spinning this narrative that the Government only had a working majority of two or three, and it was only a matter of time before the Government fell.
"That's not the case... we'll get the budget through in September, and the Government will last full-term in my view.
"I see no reason why it shouldn't last full-term.
"And that means there will not be a Sinn Féin-led government this year, next year, the year after and maybe not even the year after that".
Reduced gas supplies
On the cost of living crisis, Mr Varadkar says the country may not have enough gas to meet our needs if Russia reduces supply.
"There is a difference between the problems that we face when it comes to the cost of energy... and the supply of energy.
"That second problem of supply has not yet arisen, but [Russian] President Putin is willing to use commodities as a weapon of war.
"There is a domino effect, so we have to plan for the possibility of reduced gas supplies.
"There is a possibility, and it is a real possibility, that we wouldn't have enough gas to meet all our needs".
While Ireland is also set to ratify the Outer Space Treaty, which has been on the books since the 1960s.
The treaty stipulates that the Moon and other bodies can only be used for peaceful purposes.
It also states that space exploration is open to any country.
Mr Varadkar explains: "There are 80 or 90 Irish companies now involved with the European Space Agency - whether it's involved in the IT or parts for satellites, you name it, we're very much involved in it now.
"But what's happening in the next few months is we're actually going to launch the first-ever Irish satellite, called EIRSAT.
"But before we launch the satellite we have to make sure we have all the legals in place."