The world's largest retailer plans to spend $50 billion over the next decade to stock its shelves with more American-made products, in a bid to boost the nation's economy. Wal-Mart Stores (WMT), the largest private employer in the U.S., also pledged to hire 100,000 veterans over the next five years, and help current part-timers who want to move to full-time make the shift. "At the heart of our national political conversation today is one issue: