DUBLIN (Reuters) -Most of Ireland's big corporate taxpayers have so far escaped the direct impact of U.S. tariffs, ​but American trade policies have made the outlook for this critical source of ‌government revenue increasingly uncertain, Ireland's fiscal watchdog said. Irish corporate tax receipts, paid mainly by a small ‌number of U.S. multinationals, have jumped sevenfold since 2014 to account for close to one third of all taxes collected and transform the public finances. The Irish Fiscal Advisory Cou ...