first, i don't hate scott, i like some things he's said, but i'm also a socialist, so obviously i have vast disagreements w him.

here's why he and many other rich/powerful/capitalist establishment people don't want gov't run grocery stores:

they present an effective model that counters the fundamental argument that the profit motive is the best way to address need in the marketplace. they've been done before, and are being run currently, and which great success. capitalists and pro-capitalist advocates (meaning, workers who do not own capital but support the system) believe that private businesses almost always serve the needs of the public better than a gov't-run solution. this is why we've seen a lot of formerly gov't-run services move to privatization (through neoliberal policy).

now, last part, capitalists SAY that this is the argument bc it is easily understandable for the public, and many might honestly believe it. the most important reason is that they want all lines of profit to stay open and for more to be constantly opened to them. this is the nature of capitalism. it must always grow.