Another easy method - fire as many employees as needed to get down to 9500 (to allow slop for day-to-day staffing attrition), and make *sure* they know why they're being fired.
And then work everyone else mandatory overtime.
That would cost them more money. Walmart likes to keep everyone a few hours short of the 40 hour week, just to make sure they don't have to pay the higher overtime rates. I don't know why they don't just put all the employees on salary, then they could squeeze more hours out of them without worrying about paying overtime.
It takes somewhere around 300-500 employees to run a Wal*Mart store (assume Super Center, which is about all they build anymore). Even if they only had 300 per store, they'd only be able to operate 31 stores in Tennessee. There's probably that many Wal*Marts in the metro areas of Knoxville and Nashville alone.