"Important to whom?"
Important to lawful civilizations.
If you think that there should be better regulations around setting transfer pricing, then vote for it.
Unless companies are breaking the law, then there is a very profound 'distinction'.
Some tax issues are easily resolved, or at least, easily improved. 'Transfer pricing' is not one of them. It's very thorny.
I for one think that Apple's argument of 'the innovation and design is done in California - not Ireland' - is pretty reasonable.
Im fact - the US government should be reaping most of the tax dollars that Apple generates, not Ireland.
That said - if they have operations in Ireland they should be paying taxes there.
I think that a company should pay it's 'primary corporate tax' in the place where it is incorporated and has it's major operations.
And then ancilliary countries like Ireland can tax them at a corporate rate, but discounted for what they payed in America. Ireland's biggest tax receipts from Apple should come from VAT - which is the fairest tax of them all, because it's applied to each iPhone sale in Ireland, not France or wherever.
Currently - it's upside down: if a Canadian company has a subsidiary in France, they pay their corp tax rate in France for sales there - and then only a 4% remittance fee to Canada. To me that's backwards.
The American system is the worst: American companies pay full tax overseas - and then full tax back in America. Plus American corporate taxes are high.