The simple fact of the matter is that the world would be better off with Taverner dead. Losing his wife and children is as close as anyone can get to implementing the first-best outcome. The idea that everyone has value is fiction - Taverner is an unemployable drug addict who spends all of his time posting on a political website. He's a loser - he's CHOSEN to be a loser.
Taverner: kill yourself. We will all be better off, especially your kids, who are already larded with the shame of you as a father.
Sorry to sound harsh, but this is reality we're talking about. Go and die, Taverner.