Halliburton's move out of US paying rewards already

Now remember, as a US citizen this is completely illegal and not allowed though for businesses, it's perfectly OK to pack your bags and stop paying US taxes. US citizens are required to file US taxes regardless of where they reside and even if you rescind your US citizenship, you are required by law to continue filing (and possibly paying) for 10 years.

Why corporate America is allowed to operate with such different terms speaks volumes. Halliburton must be so happy to have saved $133 million in taxes. Why does Halliburton, who has profited so handsomely courtesy of the US government, hate America?