Psychological wellbeing is great! But this report was much ballyhooed in Irish media to claim that the program paid for itself when it absolutely did not.
Making Tuesday free ice cream day would also improve psychological well-being, but that doesn't help pay for the program.
My taxes pay for the programme. That is why I pay them. If the programme benefits psychological wellbeing, then it is worthwhile for me to pay for it.
Whether you choose to quantify this in terms of monetary net contrib to the economy as a broad concern, or as direct public benefit, is splitting econ hairs.
Making Tuesday free ice cream day would also improve psychological well-being, but that doesn't help pay for the program.