International HQs are in Cork, your article says that and I did use the word some taxes. It also benefited from the Auto industry bailouts. I may not be 100% but there is a lot of truth in what I stated which I gleaned from articles like you quoted. Milwaukee is not the legal international HQ, Ireland attracts companies because of their sometime initial no tax rate and later a low tax rate. They are not there for the good of the US taxpayer just their shareholders.
Companies do this all the time, lower tax rates for corporations can be expected in the near future, the average Joe or Jane will pay more taxes, count on it.