You initially claimed that England had 'stolen' messrs Rice, Grealish and Keane. Its a spurious point in the extreme, not least because Keane, born and raised in Manchester, played for Ireland youth sides a grand total of 4 times and England youth teams a total of 24 times. Grealish was born and raised in England and qualifies for Ireland through the Grandparent rule. His great grandfather Billy Garraty was English and actually played football for England once. Rice is another player that was born and raised in England and only qualifies for Ireland through the grandparent rule. Ireland pursue these players when they are children through their parent(s) connection to Ireland. Its a risky game to play because one day these players will be adults making their own decisions and it might be that they want to play for England or which ever other nation they qualify for. Maybe it's for their careers, maybe it's because they feel more affinity with the other nation unlike their parents or maybe it's a bit of both. It matters not.
There was no 'theft' and no reason for Ireland to feel aggrieved, dual nationality and multiculturalism is a fact of modern life, here we see it expressed in football. All nations try to get the best players they can, sometimes it works and sometimes it fails.
Why you have gone on some tangent about foreign investment in the Premier League I don't know. Perhaps it is some preemptive strike in order to discredit any future success England might have to make you feel better. There are always easy to define reasons as to why some nations are more successful in international football, it isn't because of some inherent superiority. Nonetheless, I'm enjoying following England more than ever at the moment.