Earlier quoted context omitted.
I'm always skeptical when someone precedes "close the loophole" with the word "just", especially when the entity searching for loopholes has hundreds of billions of dollars in cash. Closing loopholes is good, but they'll almost certainly find another one.
The thing, though, is that their main "loophole" currently consists of "play chicken with the government until someone passes a tax holiday". If you make it clear there will never be a tax holiday, but that you will instead keep adjusting the rules to go after earnings withheld abroad, at some point the rational choice for them will be to bite the bullet and repatriate the income. As it is, the most rational choice f…
Another rational choice is to relocate the company, a la Burger King's move to Canada [1,2].
Then the government can counter with tariffs [3,4]. It's a balancing act, though.
[1] "Tax inversion", Wikipedia. https://en.wikipedia.org/wiki/Tax_inversion
[2] "Let's Abolish The Corporate Income Tax", John C. Goodman, Forbes, Aug 26, 2014. https://www.forbes.com/sites/johngoodman/2014/08/26/lets-abo...
[3] "Trump takes aim at Obama's ban on tax inversions", Larry Light, Moneywatch, April 21, 2017. https://www.cbsnews.com/news/trump-taxes-corporate-transfer-...
[4] "Trump to keep Obama rule curbing corporate tax inversion deals", Reuters, October 4, 2017. https://www.reuters.com/article/us-usa-tax-inversions/trump-...