For years, low-price leader Wal-Mart was considered good for shoppers and bad for America. In 2005, muckraking documentarian Robert Greenwald targeted, among other things, the superstore's stingy and overpriced employee health care coverage.

Good news, elderly store greeters. Following two years of consulting with the likes of Bill Clinton, the nation's governors and the Centers for Disease Control, Wal-Mart has decided to overhaul its health plans to include more employees and part-timers. One exec noted that healthy workers, "will do a better job at work...they'll be happier."

How on earth did a corporate behemoth like Wal-Mart decide to put its workers first?