Two parallel announcements made on either side of the Atlantic late on Wednesday night help us understand the tax challenge facing Ireland’s successful campaign to attract investment by American-headquartered multinationals over recent decades. At the Carpenters Pittsburgh Training Center in Pennsylvania, one of the states worst hit by the negative aspects of the economy’s globalisation and digitalisation, US President Joe Biden announced his Made in America tax plan. “We’re establishing a global minimum tax for US corporations of 21 per cent. We’re going to level the international playing field. That alone will raise $1 trillion over 15 years,” he said.…