George Osborne's own Office for Budget Responsibility reports today that current policies to restrict immigration will leave our ageing population completely screwed, with an increase in national debt from 75% of GDP to 99% by 2036. More net inward migration is needed as the report notes that immigrants are more likely to be net revenue contributors. Love to say "I told you so"

http://cdn.budgetresponsibility.independent.gov.uk/2013-FSR_OBR_web.pdf