Think of your best experience ever at the Department Of Motor Vehicles. Then compare that unlikely memory to your worst experience at a Wal-Mart. The occasional long lines or the difficulty you might have getting help from time to time.
Think of the busiest Post Office you've seen in the past year. Compare that to the slowest Wal-Mart (granted, a slow Wal-Mart is sort of a contradiction.)
If you've ever done any building contracting, think of the most delightful experiences you've had with city electrical, plumbing, and mechanical inspectors. Think of how prompt they always were for their appointments, plus or minus six hours. Remember the what it was like navigating through their f***ing automated phone trees and getting sent to the same damn recording multiple times. Compare that to the times you've found a Wal-Mart out of stock on anything but the hottest Christmas items.
If you happen to work for a Wal-Mart supplier (Full Disclosure: I do), and you work in the shipping and freight end of things, did you notice some of the guys that The Teamsters started sending out from YRC about a year ago? I bet it takes some of those guys five or six tries to back up to a handicap-stall toilet. And yet those dangerous, low end, non-union Wal-Mart drivers can always, without fail, back up to the gates of Hell without pulling forward to straighten up a single time.
Compare the U.S. government's response to Katrina....
....with that of Wal-Mart.
Then, when you're finished with all of those mental gymnastics, go here.