I've seen him have this dialogue several times. My guess is that he's done it hundreds of times. That's the definition of the word "trite." The obvious champagne socialist firebrand dialogue has been had, in the same way, for generations now. Oscar Wilde. etc.
This article does mention "champagne populists" as a type example from the political right. The other obvious comparison is "champagne religion," preaching chaste poverty while indulging like epicurean hedonism.
Despite being trite, I think there genuinely is something to "if the shoe fits." Engels like other socialists & epicurean hedonists (eg chris hitchens) "get away" with church marriages or baptisms. It's hypocritical in theory but no one cares. Priests get away with greed, but not with hedonism. Hedonistic hypocrisy sticks to religion in a way that religious hypocrisy does not stick to epicureans & socialists. Neither wealth nor hedonism generally sticks to the "populist," but failure does.
Anyway... I do think that champagne shaped socialism in a negative way, personally. The position of Engels, Wilde and others pushed the ideas in certain directions. They tended to see communism as an indivisible. A slice of communism had no value... otherwise why not use their resources to create a slice of it themselves. Total revolution, or none at all. Seemingly unresolveable conflict at every turn breeds "singularity" thinking.