Well, I have to say that agree with some of Sachs's article. In particular:
- the increasing divide between the rich and the poor/middle classes
- the imperative for spending cuts while protecting the basic needs of the poor and vulnerable
- his conclusion that companies and individuals are increasingly mobile internationally
- his analysis of current US tax policy.
However, I disagree with his assertion (I can't see any supporting evidence) that corporation tax competition is driving a race to the bottom, caused by rich individuals and multinational companies threatening to leave high tax countries.
First, it's too simplistic to simply look at headline tax rate; you have to look at the base of profits to which the headline tax rate is applied too. I refer to this as the overall tax take, and it's a far fairer method of reviewing how competitive a particular jurisdiction is.
Secondly, it's not that multinational companies are threatening to leave the UK. They are leaving the UK, and in droves. In my view, what has happened over the past decade is that the UK tax base has steadily widened, and contemporaneous decreases in tax rate (from 33% to 30% and then 28%) have not compensated. But undoubtedly companies are putting their money where their mouth is; when such a strong message is being given it would be a foolish government that didn't listen.
Thirdly, in my professional job (advising governments on tax policy) I'm simply not seeing a race to the bottom. Quite the opposite. Instead considerable pressure is being put on low tax regimes to step into line with the international norm. For sure the most pressure is being put on the tax havens, but Switzerland and Ireland are getting their fair share of grief.
I do have a question in my mind over whether the Chancellor has gone too far back the other way. The reform to CFCs will definitely take some income out of the UK tax net (rightly, in my view) and I'm not entirely convinced that he also needed to reduce the tax rate from 28% to 23% as well. Time will tell.
Regarding Northern Ireland having a lower tax rate to the rest of the UK, I think it's bonkers.
It would only make sense if there was evidence that it would encourage new business from overseas into the UK. I don't think it would; I think it would simply divert profits from the rest of the UK to NI, and so throw money away. My evidence for this is the roughly 40% of Eire's tax take is paid by US parented groups; that's about the same figure as in the UK. Which suggests to my mind that we're already pretty much maxed out at inward investment.