At this rate, I can envisage a scenario where all graduates from the UK will be allowed to carry on working in the UK..
Actually, Student Visas will be more difficult to get in the future as they are becoming more or less a ticket for settlement....
forexample
1). A student comes to the UK and takes a 4-year undegraduate course... which ends up as a 5-year course as the student takes a 'year out' then s/he is allowed to work for another year (new rules)....therefore the student has been in 'England' for 5 years.
2) on completion of 5 years in England - the student moves to Scotland - and studies for a 2 year masters course,
3) on completion of the course, the student is allowed to work in Scotland for 2 years
That is already 9 years in the UK, and with some slight 'twicking' of status its already 10 years, or the student has already gotten a work permit.
The moral of the story is that its bound to become easier for graduates to remain and settle in the UK..
I wonder why John Major never thought of such brilliant ideas during my 'good student' days

Where there is a will there is a way.