> They were promised the EU wouldn't interfere with their tax policies EU promised not to meddle as long as preferential treatment wasn't given. As in if Irela

> They were promised the EU wouldn't interfere with their tax policies EU promised not to meddle as long as preferential treatment wasn't given. As in if Ireland gave the exact same tax deal to every company in Ireland then it would have been fine. (the no preferential treatment in taxation bit is part of getting access to the single market)