A defined cap on immigration of this type seems ridiculous for reasons already mentioned as well as the lack of flexibility it provides to a constantly changing work force demand. I don't understand why a points based system can't be used and just tweaked to make it extremely difficult for anyone not currently required to work here.
Another potential major issue is the effect on universities this may have. International students provide a significant income for numerous universities (as well as obvious academic benefits) subsidising home students. Suggestions are that half of the international student Visa's will need to be cut to meet the immigration cap which could prove to be a double hammer blow for universities as they are already being hit with substancial cuts.
