When businesses stop paying the big bucks for graduates...
Sorry, it'll happen long before business catches on. It'll happen when the average Christian father makes up his mind that the spiritual well-being of his children is his responsibility and his alone, and that having children with a solid Christian worldview is more important than 10,000 degrees from the best Ivy League school. He will pull his gradeschool and high school age children out of the government school system and either teach them at home or place them in private Christian schools where it'll be more likely that children will continue their education at Christian universities rather than the spriritual cesspools currently in vogue. When the money starts flowing away from the Harvards and Princetons, businesses will surely follow.