A champagne socialist is someone who talks about and identifies themselves as being someone on the left wing, for example a socialist or communist, but lives a life of indulgence in extremely trivial and material things.
    ~ https://UrbanDictionary.com/define.php?term=champagne%20socialist
 

"Champagne Socialism" or "Limousine Liberalism" are derogatory terms that are usually used to describe upper class people who are ardent supporters of left-wing causes. What's interesting is that the terms are used by people on both the political right and left, in both cases to showcase a sort of hypocrisy to these leftist causes.
    ~ https://www.ZachSmithwick.com/the-origins-of-champagne-socialism/
 

Gravitas: Socialist leaders and a life of luxury (4:31) ~ WION, Oct 30, 2020
 

The term " champagne socialist " is a snarl word used primarily by folks who believe in shooting the messenger that people who have been the beneficiaries of capitalism should be precluded from criticizing its failures and shortcomings. In other words, those who have eight cows shouldn't try to redistribute your three.
    ~ https://RationalWiki.org/wiki/Champagne_socialist
 

To a Soviet citizen, the idea that wearing perfume or drinking champagne were somehow uniquely incompatible with communism would have been nonsensical. While excess and pleasure were firmly associated with the evils of capitalism in the immediate aftermath of the Bolshevik Revolution, over time Soviet leaders adjusted their thinking.
    ~ https://Lux-Magazine.com/article/champagne-socialism/