As net migration to the UK hits record levels, many opinion leaders, especially in the Labour and Green parties, claim this is no bad thing. Don’t worry about the numbers. They are just a sign of our interconnected times. We get to go on holiday or retire in Southern Europe and they come here to do all the jobs we used to do, add a little spice to our life and, of course, boost our wonderful economy. Naturally more people lead to greater retails sales, but any net benefit can only measured on a per capita basis.