Martha Burk writes on The Huffington Post: “Seven years ago a judge in California ruled that women suing Wal-Mart for sex discrimination could move forward as a class. That meant the women with various claims wouldn’t have to go it alone, each with a separate lawyer and separate expenses. Essentially what the judge said is that the six women who filed the lawsuit can represent a whole group of women who might have similar complaints — all 1.6 million of them.”