Tony Kushner can't make a living writing for the stage. America's most prominent playwright confessed in an interview published in Time Out New York earlier this year that "Angels in America" doesn't pay the rent: "I make my living now as a screenwriter! Which I'm surprised and horrified to find myself saying, but I don't think I can support myself as a playwright at this point. I don't think anybody does." So far as I know, Mr. Kushner is right. I don't know of any American playwrights who earn the bulk of their living writing plays. Many of the older ones teach, while a growing number of younger...