Pity the writer had to sling an insult on the end of this interesting viewpoint:
The EU is modelled to be an ‘optimal currency union’, which includes not just unbridled capital markets but also free movement of labor across borders. I am, with some important qualifications, a proponent free movement of labor. One of these qualifications is that, when you’re like the UK part of the ‘free labor’ zone of a currency union, but not part of the single currency union itself, you should have a decisive voice in the monetary and fiscal policies of the members of the currency union. As this is not really the case, the UK has, in my opinion, a reason and a motive to restrict the inflow of European labour. Do you really want your country to become the employer of last resort for other countries, solving the problems caused by their macro-economic policies failures? In my (in this case: humble) opinion I do think Brexiteers have a point here. Even though their mind set often is retarded.
The quotation is from this piece on an economics blog. Interestingly, although the writer has slung that insult in, s/he seems to be arguing by the end of the article that, logically, Brexit is a better idea. It's not a long article. Worth a read.