By joining the EU, Ireland has signed treaties governing this.
what's in question isn't the low taxes Ireland offers companies in general; what's in question is why Ireland offered Apple much better deals than anyone else - and according to EU law (which Ireland has signed to uphold) it's illegal to give unfair advantages to individual companies.
The 14 billion $ they're supposed to pay are no penalty - they're the amount Apple paid less than all other companies who were profiting from low corporate tax in Ireland as well.
Except they didnt get "better deals than anyone else"
Abbott Labs
Adobe
Facebook
Google
General Electric
Johnson & Johnson
Microsoft
Oracle
Starbucks
Yahoo
all took advantage of what is commonly termed as "The double Irish" Apple has been doing it since the 80's and prior to the E.U even existing. Therefore they got grandfathered in after E.U. tax law took effect. You cant charge someone a tax rate for years......nay, decades, then after the fact, when you dont like it anymore, come back and say, oh, we want more money. Ummm, No. I paid what you told me to pay based on the law. If you dont like the law, change it, dont say we cheated. The E.U. knew very well what has been going on, and allowed it, and is still allowing it with other companies, so its not a Apple only "special deal" They just make more money.
People keep saying,"What if your neighbor got a tax deal like that" Well, conversely, what if the government showed up to your house and said, "Yeah, you know how we said your tax rate has been 12% for the last 10 years? Well, we appreciate you paying what we said you owed, and it seems you filled out the forms correctly and didnt lie,but........we've now decided you should pay 35%, not from now on, but for the last 10 years. So, that will be $12.5 million please" Im sure everyone here would say, "Oh, ok, well fair is fair. If you think now, after the fact I should pay more, ok then"
Come on.