“Walmart is partly to blame for this. They know from past experience that there have been confrontations with irate customers at the exit door.”
Yes, but they have been isolated incidents, and Walmart has prided itself on hiring older citizens to be “greeters”.
The main reason is that older Americans still know civility, and how to be polite.
They are honored to be able to work, despite minimum wages.
Perhaps you would prefer a SEIU union thug with his billy-club.
I don't know if "civility" is the main reason Wally World hires them, but it certainly is one of them.
They are also hired because they have a strong inbred "work ethic", arrive at work on time...work the assigned hours....don't much care about a little overtime now and then, respect customers, are polite (civil, if you will), and don't whine constantly about the workplace or work environment.
And for this, I say: Good on ya, Wally World!