1/ Well given that so many countries are effectively paid to take part in this project, why not? We are the second biggest net contributor, but take much less out than does France? How come? How is that fair or right?
In 2013 we put in €10.8bn more than we took out - this, incidentally, from a country that you and other Eurofanboys like to claim is half-hearted in its contribution to Europe. Well the numbers say different.
2/ As to your studies, I'd love to know how they've calculated what those migrants and their impact on infrastructure are likely to cost us over the next 25 years or so.