Oh quite some time I would expect. The current system actually suits the wealthy quite nicely - on the surface it seems like it's a fair system allowing for admissions to be done based on merit. But as the article indicates, in reality the wealthy can buy a ticket for their children. So the proles are happy because they think the system is fair, and the rich are happy because a) they know it's not, b) they know the proles think it is, which gives them social cover.