>>Are you talking about people that are ON welfare, but also work for Walmart?<<
If you are an adult working minimum wage, you are eligible for several means-tested benefits like food stamps (eligible if annual income under $16,752) Medicaid (eligible if under $18,075) and quite a number of other benefits.
And don't forget other income redistribution features of the tax code like EIC and Child Tax Credits.
Throw in state and local government subsidies for plant/infrastructure and you get the new American business model of "privatize the profits and socialize the costs."
We may hate Corporate Welfare, but it is how the game of business is played in this age of globalization. The self employed and small entrepreneur be damned of course.