I agree @Nuevabegin. It's a bit archaic to suggest it's all because parents bat away all offers of help.
That may be partially true, but there is simply no denying that families have changed a lot since I grew up (also in Ireland btw - I'm now in England). My English in-laws need to work still. They aren't around to help out day to day and, frankly, they wouldn't want to. if we're going to get into "all I read on Mumsnet is...", well how often do you see "nobody owes you childcare. Pay for it yourself. They've raised their kids and have earned their retirement". I don't have an issue with that at all, but I don't see how it's now all the younger generation's fault that they don't get as much help as previous generations at all.
My grandparents had a comfortable home, all paid off with quite a generous pension to retire on when they hit 60. My in-laws don't have that luxury despite working all their lives.
Also, people leave home more to see the world and study etc. So families are less likely to be in the same town. I left for uni at 19 and never went back to life in Ireland. Dh's family are all English and have remained in England, bar a few in Australia. But nobody is in the same county let alone the same town.
Then add to that that it's quite unusual for one parent to choose to, or be able to stop work entirely, so the groups of stay-at-home mums who all helped each other out day to day when I was little are all at work most days.
As I said in my previous post, I don't even think any of this is a negative. I don't think I'd swap my life for my mum's when we were growing up.