To those who argue that Apple should just pay "honestly" and not do just what is legal but what is right. That would put Apple at a disadvantage to all other companies. In order to get companies to pay more they all must pay more.
If they make the Oil Companies pay more taxes, that would be an excuse to increase the price of gas, and we all will have to suffer the consequences.
It's a very complicated matter, like a huge spiderweb, you'll get stuck to it while trying to free someone else.
Apparently they have nothing to do, so they are going for the most vulnerable. The government doesn't care if we have to pay more for our iPads in the future due to a tax increase to Apple.