A rightwing adaptation of A Modest Proposal for the Trump era might replace the Irish babies with illegal immigrants (think Alligator Alcatraz meets Soylent Green). The one snag might be that it would have to be Certified Fetus-Free, to placate the pro-life crowd.

They are using it in a different sense. Not that they are considered luxury goods by being expensive and associated with higher socioeconomic standing, but that they are a frivolity which is not necessary and which has tangible costs that they feel are justified due to pure pleasure.