The Irish thing works for a contractor based in any country flying for any airline. Essentially his Irish registered company is the employer and the employee is essentially seconded to the ariline or agency
As the employment remains in Ireland the tax base will also remain there. So if you set it up as part of a BRK contract and ended up contracting with Kingfisher or somone in India rather than go through the same thing again you can keep your employment in Ireland.
It also means that you will qualify for an Irish state pension after a few years. This is better than paying a few years worth of National Insurance in a half dozen different countries that a self employed pilots ends up with. I have three years in Australia, Two in Tailand, and single years of NI type contrinutions in a few other places all of which are of no use to me. Thankfully I worked long enough as an employee with BA to qualify for my state pension in the UK befroe I decided to start contracting.
As the Irish have decided to leave self employed pilots alone for now it seems to be the best jurisdiction to place a "flag of convenience" for tax purposes for any pilot who is contracting. At the end of the day you get a P60 from an Irish company which is better then getting it from some offshore location that will set off the alam bells with the Inland Revenue.
My mate is now paying 10% income tax on a FO salary with all of his taxes paid in Ireland and the UK. It would nearly make me think about going back to contracting.