Dylan Matthews had a fascinating piece about a young man named Jason Trigg in The Washington Post on Sunday. Trigg is a 25-year-old computer science graduate of the Massachusetts Institute of Technology who has hit upon what he thinks is the way he can do maximum good for the world. He goes to work each day at a high-frequency trading hedge fund. But, instead of spending his ample salary, he lives the life of a graduate student and gives a large chunk of his money away.