Trying to think of something that could possibly be right about the old lefty Vince Cable's plans to introduce a graduate tax to replace tuition fees.
Nope - can't think of one. Like all lefty nostrums, it assumes that the majority of the target population will stay in Britain. The possessors of soft degrees may well do so - but there is no evidence that those degrees (including all MBAs save those from the most elite business schools, none of which are in Britain) increase lifetime earnings.
Law is a uniquely special case, medicine rather less so, but otherwise those who get degrees that are valued internationally will simply emigrate, and bid the British state kiss their arse.
So let's call it what it is: the Brain Drain Acceleration tax. What is it about the concept of supply and demand that seems so unfathomable to the lefty mind?