Wal-Mart Stores Inc. will offer employees and dependents heart, spine and transplant surgeries at no cost at six major hospital systems across the nation, with free travel and lodging……………It’s all part of a growing movement by employers fed up with wildly different price tags for routine operations. In response, businesses are showering workers with generous incentives — including waiving deductibles or handing out $2,500 bonuses — to steer them to these top-performing providers offering bargain prices.