If that was the goal he would have had Amazon buy the company. Instead it's a "personal" acquisition.
It's possible this is an elaborate ruse to fool the Graham family into selling their crown jewel (reputationally, at least. The Kaplan test preparation unit is the tail that now wags the profit dog at Washington Post, Inc., as I understand it.). However, that seems like a stretch. I'd much rather have a paper run as a hobby by a man (even a profoundly eccentric one) who can afford it than a board desperate to maximize quarterly earnings.