Anybody under the illusion that Ireland is a sort of paradise for wealthy tax exiles might want to think about Leslie Charteris. The writer of The Saint, the hugely popular Roger Moore TV series, he moved here in the 1970s to avoid paying a fortune to HM Revenue & Customs but had a thoroughly miserable time among the burghers of south Dublin. Why on earth, he asked, would anyone live in Ireland if they didn’t have to.