ford to pay its workers more. It earned $16 billion last year. Much of that sum went to Walmart's shareholders, including the family of its founder, Sam Walton its largest shareholders. The wealth of the Walton family now exceeds the wealth of the bottom 40 percent of American families combined, according

l challenge for the United States today and should be getting far more attention in this presidential campaign. A few snapshots: • The six heirs of Sam Walton, the founder of Walmart, own as much wealth as the bottom 100 million Americans. • In 2010, 93 percent of the gain in national income went to the t

what surprising outburst on CNBC earlier this year. (Mr. Steinhardt has long held an inexplicable grudge against Mr. Buffett.) Another billionaire, Sam Walton, the founder of Wal-Mart Stores, did not start the Walton Family Foundation until he was 69, just five years before his death. In his autobiography,

what surprising outburst on CNBC earlier this year. (Mr. Steinhardt has long held an inexplicable grudge against Mr. Buffett.) Another billionaire, Sam Walton, the founder of Wal-Mart Stores, did not start the Walton Family Foundation until he was 69, just five years before his death. In his autobiography,