http://news.bbc.co.uk/1/hi/education/8271287.stm
In just one year 2007/2008 250,000 students from outside the EU came to Britain to study. The number each year is rising exponentially so it may attract up to 500,000 next year.
What is the % of students who return after they finish or drop out of their studies?
Assuming 80% decide to stay should they compete with British or EU students especially as many of the graduates will not be able to find work?
Should the overseas visa expire at the finish of their studies?
Where should the limit to stay be drawn if at all as there is no maximum at present?