Oddly, I've got just been researching this odd phenomena:
I've just finished driving around Ireland (The Wild Atlantic Way) in a converted van.
A picked up four, FOUR, pieces of litter at my last (wild) park up - and not a scrap anywhere else in two and a half weeks. I visited a ton of ruins, beaches and areas of natural beauty.
I could not participate in my usual form of public service despite my personal commitment to bag up at least two pieces of rubbish per day.
Yet, there are barely any public bins, and the one you get a service station has the tiniest of holes to put stuff through. In fact, it was the hardest part of the trip - getting rid of my rubbish. I practically had to beg places to dispose of a bag here and there.
I'm in NI tonight. Rubbish everywhere, bins a-plenty. It makes no sense whatsoever.
Apparently, bins are privatised in the Republic, but council-managed in NI. Somehow, this explains the phenomena?!