Pro-EU march in London on March 25, 2017 (by Ilovetheeu via Wikimedia Commons) "Open-door migration," wrote Nigel Farage on June 21st, 2016, "has suppressed wages in the unskilled labour market, meant that living standards have fallen and that life has become a lot tougher for so many in our country. We must leave the European Union so that not only can wages increase for British workers but so that living standards rather than declining can start going up. The wellbeing of those living and working in our country matters to me more than GDP figures. The EU’s open borders make us less safe. As a bureaucratic club it makes us poorer." The Vote Leave campaign, too, warned that immigration posed a threat to the UK's safety and prosperity. "Nearly 2 million people came to the UK from the EU over the last ten years. Imagine what it will be like in future decades when new, poorer countries join," Vote Leave argued. In September 2017 UKIP le...