If staff turnover increases in a private business it will conduct "exit interviews" with leavers to find out why. Losing experienced staff who understand the business is a bad idea, as is wasting cost on recruitment and training.
Maybe the UK should start to conduct exit interviews with its emigrants? One factor they might detect is weariness with the dishonest use of the English language. For example, this quotation from the article;
"Perception of crime is another of the main reasons for people wanting to leave,"
Isn't it enough to be driven out of your home country, without suggestions it is your "perception" that is at fault?