Ireland does not have a super low population density at all (over 7 million on this island now) and Dublin has the same population density as Amsterdam and Copenhagen and no, Ireland is not smaller than Manchester just because Jack Charlton said it 40 years ago. These off the cuffs 'low density' assumptions are not as relevant as they are made out to be. England has one of the highest pop density on the planet. They are the exception, not the rule. This is not whom we compare ourselves too when talking rail investment. New Zealand is VERY different geograpically than Ireland. Again, not the same.
We have a government and civil service who wear onesies watching the Late Late Toy Show while giggling. There is no leadership and foresight in this country. That's the problem not our population density.