I did some quick math because this one was bothering me.
2 million employees x 6.19 dollars an hour x 30 hours a week to avoid paying benefits x 52 weeks a year = 19,312,800,000
Walmart would still need to change its business model to stay a float. Poor them, no more exploiting third world sweatshop labor to artificially drive down prices and eliminate competitors who would pay their employees a decent wage. It's Communism, I tell you!