That doesn't bother me any; U2 has generated tons of indirect income for Ireland via tourism and overseas awareness of Irish culture (and products and services). That's the whole point of subsidizing the arts via the tax code. Most artists are earning much more modest incomes.
Things are not exactly roses in Ireland at the moment, but it's a long, long way from being a third world country.
I'm always surprised the Irish aren't more pissed off about Bonno - uses Irish tax code that says artists don't have to pay tax, then goes around boasting how many euro he's raised for the 3rd world, while back home isn't exactly roses.