Those companies discovered they could put an office into countries like Ireland and let that be their international headquarters. Since Ireland and a few other places had very low taxes they could shelter much of their worldwide income. It was a loophole not created by anyone here but took advantage of existing law. Once a few companies were seen doing this and it was upheld many companies jumped in. That's why lawyers earn big bucks. TTKU.Be thankful lol. Man they really got you fooled. They sat on it overseas because of Republicans, and you're thanking them.