
Richard F. answered 02/19/20
Four degrees. College professor. Novelist.
I don't know whether or not there is an direct evidence, such as Orwell discussing Kipling as a specific source for the slogans. I don't believe so. But you have to understand that Orwell had not "read at least some of Kipling's poetry" - he considered Kipling one of the most important writers in the history of the language, had probably read (over and over) absolutely every single word Kipling ever put in print, and probably knew large chunks of his poetry by heart. I am guessing (and it's only a guess, I admit, but a highly plausible one) that Orwell not only was deliberately echoing Kipling but simply assumed - as was reasonable, at the time - that the great majority of his audience would instantly recognize the fact.
BTW, despite what you quote, Orwell had the profoundest admiration for Kipling as a writer - and was far more acidic about people who dismissed Kipling as a writer (because they shared Orwell's hatred of his politics) than he ever was about Kipling.