Yes - tax can also be used to attract certain industries
eg the R&D tax credit was brought in to try and encourage innovative businesses to set up here thus causing employment for our many science graduates etc
MindtheGapp - TP rules wouldn't let that work either. The sell back price would again be compared to third party rates.
If you look at some Italian shoes, they are made in China dirt cheap and then the leather is put on in Italy. this isn't for tax reasons - this is so they can stamp it 'Made in Italy'. pure marketing.
Companies would be stupid to make decisions purely on tax grounds.
I know someone who was complaining about a company that made a loss and were able to carry it forward to set against profits of the following year thus not paying tax in either year. What they failed to realise was that the cash flows meant the company made a real loss regardless of the tax saved!