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This trend at Walmart represents a bigger problem with the U.S. economy.
Companies have expanded a lot since the downturn, but haven't hired that many additional workers, leading to high unemployment.
Bloomberg News reportedly received thousands of emails about the empty shelves at Walmart.
Dudley interviewed Bob Shank, a Tucson, Arizona man who said his local store had "bare shelves" with "yards of empty spaces" and "few employees visible, especially at the check-out counters." 
Another customer from Illinois said that Wal-Mart founder Sam Walton "must be rolling over in his grave to see what has become of his business." 
Wall Street analyst Colin McGranahan told Dudley that Wal-Mart's problems can be attributed to a shortage of employees. 
Wal-Mart is the largest U.S. employer, with a workforce of 1.3 million. 
In a statement to Bloomberg, Wal-Mart denied that the story is accurate. 
"The premise of this story, which is based on the comments of a handful of people, is inaccurate and not representative of what is happening in our stores across the country," a spokeswoman said. 
Even if the story isn't true, just this chart alone, from Bloomberg, reveals the problem with the U.S. economy: Corporate growth is not translating into more employment.
Walmart chart