High unemployment rates are solely the result of minimum wage laws and other government intervention. Every job hunter could get a job if he was willing to accept a wage that would allow his employer to profitably employ him, given his productivity level. Walmart wage suppression allows Walmart to pass the cost saving onto customers. There is no net harm to society. Some win. Some lose. Thems the breaks.
Let's not forget that stuff like food stamps also reduces the wages that Walmart would have to offer to attract employees. It's like the perfect storm of political stupidity.