Found this quote from Alex Salmond on the Robinson business:
Of course it is. The problem with Nick [Robinson] … I mean, don’t get me wrong, I like these folk, but they don’t realise they’re biased. It’s the unconscious bias which is the most Âextraordinary thing of all. If the BBC were covering, in my estimation, any referendum, in any democracy, anywhere in the world, they would cover it impeccably, in a balanced fashion. What they don’t understand is they’re players in this.
Surely this is all beside the point. The relevant question is whether Salmond answered Robinson's question.
Robinson's question was why should voters take Salmond's view over that of various senior bankers and oil companies.
Salmond's reply was (before he did anything else) was to accuse the reporter of bias. Then he said that moving a corporate HQ to London wouldn't move taxable activity.
So first, he didn't answer the question. At best he simply implied either that the people Robinson mentioned didn't mean what they said, or that Robinson was misreporting them.
As an aside, the tax consequences of moving a corporate HQ would depend on the tax laws in rUK and iScotland, and the cross-border tax agreements they would have in place. I expect Salmond had banks in mind in his answer. I imagine that if the banks want to base themselves in a country that controls its own currency, south is precisely where their taxable activity would be going.