Read this excerpt from allen ginsberg’s "a supermarket in california." i saw you, walt whitman, childless, lonely old grubber, poking among the meats in the refrigerator. why does ginsberg make an allusion to walt whitman in this excerpt?

I would say Ginsberg makes an allusion to Walt Whitman in this excerpt to suggest a familiarity and kinship with Walt Whitman and other outcasts.
As you can see in the poem, Whitman is all alone, wandering around the supermarket, searching for a soul mate. He asks the poet, 'Are you my angel?' suggesting that he has no one else around him, which is something the poet can relate to.

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