I think it's worth remembering that a third of the clients in the recent QUB study assumed that what they were doing was already illegal. I suspect a large percentage of the public think it's already illegal as well.
Also remember that Sweden still have enough active clients to keep 1000+ sex workers employed in what is a relatively small country and judging by the number of client convictions, the chances of being caught are very low. The risk involved though, while it might actually enhance the experience for a few, will put a lot of clients off and unfortunately those are likely to be the nicer guys.
Despite what we might think, the govts in Ireland aren't stupid. They know this won't reduce coerced trafficking figures (which are already very low) and it won't eradicate prostitution. But it will act as a deterrent, it will show that 'something' is being done to avoid the 'normalisation' of buying sex and it just might give the likes of ruhama the chance to do something rather than going on junkets and making up statistics.
This has nothing to do with helping sex workers (whose views have been ignored and ridiculed throughout this process) and everything to do with extreme religionists, greedy NGOs and a certain misguided brand of feminist.
2014 in Northern Ireland:
Number of reported attacks on sex workers 70
Number of sex trafficking cases ZERO