-------------------------------------------------------
"Don't be taken in by this ploy. How many people will lose a job over these things? The people at the bottom who really need a job"
-------------------------------------------------------
I've not yet seen a self-scanner ... I don't have any idea how well they work or what the +'s and -'s would be, either from the store's side or the customer's side ...
However, I've been around long enough to have seen resistance to advances in technology and change in society ... there's no end to the number of naysayers when change comes and it has always been so, back to the time of the advent of the steel plow.
Columbus, it was thought, was going to sail off the edge of a flat earth, innovations such as the printing press, the steam engine, cotton gins, the railroad, electicity, motor vehicles, airplanes, submarines, airplanes, the space program and computers have each in turn taken a whipping at the hands of those who feel it wise to resist change for fear that "someone at the bottom who really needs a job" would be displaced by the change itself ...
Not that it's a direct comparison, but to illustrate my thought, here, for your consideration, is a little excerpt from a book entitled "Light! The Industrial Age 1750–1900: Art & Science, Technology & Society " ...
Like the streetlight, computers are creating new forms and concepts of night life and sociability. Like the humble oil lamp, they are becoming the glowing centers of family life. Like the telescope and the spectroscope, they are producing scientific descriptions of a universe, or universes, of unimaginable size. They are acquiring new symbolic power, too, becoming (as light once did) symbols of democracy, intellectual power, and connectedness. Like gaslight in factories, they are changing work places and work habits. They are transforming the worlds of art, entertainment, and communication—as did limelight, neon, and the cinema over one hundred years ago.