It doesn't surprise me that this is happening due to Obamacare...what I did find interesting was this comment from someone defending a comment about the "WalMart's billionaire shareholders"
"Obviously, you have a skewed view on Walmart shareholders. Many large pensions hold Walmart stocks as a hedging strategy against more volatile stocks, which makes its shareholders more along the lines of those like your neighbors.
As for the Waltons themselves, while they hold majority stock, they are not engaged in Walmart's day-to-day operations. So they are passive investors at best. Further, Walmart's executives have a substantially lower profit-to-compensation ratio relative to their peers in the retail industry. Lastly, Walmart's net profit margin is only 3.5%, which means for every $1 in sales, Walmart's already spending $0.965 in expenses. Its "billions of profit" comes purely from volume. Labor, being the single largest variable cost in retail management, is the most scrutinized expense because increase in hourly wage would have a disproportionate impact on cost.
Even Bill Gates stated during Morning Joe on MSNBC that the most likely impact of mandatory increase to hourly wages will result in job substitution and destruction".