Original sentence: "  Since Sam Walton's death in 1992 however, Walmart and the Walmart Foundation dramatically increased charitable giving.Among these are labor unions, community  groups, grassroots organizations, religious organizations, environmental groups and Wal-Mart customers.Founder Sam Walton held the belief that the company's contribution to society was the fact that it operated efficiently, thereby lowering the cost of living for its customers, and therefore in that sense was a "powerful force for good", despite his refusal to contribute cash to philanthropic causes.Having begun to feel that his wealth attracted people who wanted nothing more than a "handout", he explained that while he believed his family had been fortunate and wished to use his wealth to aid worthy causes like education, they could not be expected to "solve every personal problem that comes to [their] attention".He explained later in his autobiography, "We feel very strongly that Wal-Mart really is not, and should not be, in the charity business," stating "any debit has to be passed along to somebody - either shareholders or our customers.In 2008, Forbes ranked Wal-Mart Stores at 6th place when evaluating donations by corporations as a percentage of income.Other areas of criticism include the corporation's foreign product sourcing, treatment of product suppliers, employee compensation and working conditions, environmental practices, the use of public subsidies, and the company's security policies.They have protested against Wal-Mart, the company's policies and business practices, including charges of racial and gender discrimination.Wal-Mart denies doing anything wrong and maintains that low prices are the result of efficiency.Wal-Mart has been subject to criticism by numerous groups and individuals