The studies I have seen referenced suggest that EU migrants to the UK are generally net contributors as they pay their taxes like everyone else but tend to trav

The studies I have seen referenced suggest that EU migrants to the UK are generally net contributors as they pay their taxes like everyone else but tend to travel here without dependents, be younger and eventually go home before they are too old. Migrants from outside of the UK on the other hand tend to be older and come with families so tend to be a net drain on services. Leaving the EU will mean more migrants from outside of the EU - so will actually cause the situation a lot of Leavers were worrying about to get a lot worse. See Robert Peston's WTF? for details.