Is going to business school, law school, or getting a doctorate in Korean studies worth it these days?

I know someone thinking of doing one of the three. I say they are all a waste of time now, with the economy the way it is. You have biz grads who flip burgers, if they can even get that. You have law grads who can't find jobs, and a Ph.D in Korean studies??? What use would that be? The person I know doesn't seem too bright for someone who has a bachelor's degree from Duke...and it's in Comparative international studies/German/german studies...also a waste of time, I'd say. She owes like $75,000 in loans for this useless degree. No wonder her parents get aggravated with her.