You say obviously people will be non-productive and lazy, and I understand why you might think that, but studies so far seem to indicate that this won't be typical. People may do voluntary work, or may return to education. There are a lot of potential benefits.

I am not sure if Ireland will try it, but yes, the population here is relatively small, and it would be more workable.

A world where everyone has enough money to avoid poverty, and can spend time bettering themselves, rather than spending half their lives doing repetitive jobs that they hate? Sounds pretty good to me!