The income program provides €33,800,000 a year (2000 participants, €325 a week, 52 weeks in a year). Double that to account for cost of managing the program -- that seems too high to me, but I want to err on the side of caution for this analysis.
Some percentage of that money flows right back into the economy, of course.
Meanwhile, ignoring windfall corporate taxes, Ireland ran a €7.4 billion deficit in 2025. So the cost of the program, ignoring the money flowing back into the economy, is under half a percentage point of the budget? Those small amounts do add up, but I can't see this as relevant competition to the cost of shoring up health, housing, and transport. I don't have good estimates of how much those costs are, which is why I'm using the deficit as a relevant proxy, but still -- we ought to avoid the trap of seeing numbers which are large to you and me and forgetting that other numbers are larger by orders of magnitude. (There's a term for this which slips my mind.)