In "A Modest Proposal," Swift lists several proposals that are based on common sense. Why does he refuse to discuss the alternatives?

It is vitally important to identify the satire and irony
that runs throughout the entire essay that Swift wrote. The "other expedients" that
Swift suggests and that I assume you are referring to are actually very sensible ideas
and suggestions. In reality, Swift previously had championed every one of these
measures, yet they were all ignored by the British government. Interestingly, these
suggestions were italicised in all editions printed during Swift's lifetime to show that
Swift made these proposals with sincerity rather than
ironically.

However, by overtly pretending to dismiss such
reasonable suggestions, Swift is highlighting the failure of the British government to
do anything to alleviate the harsh penury of the Irish. He deliberately brushes aside
these suggestions, just as Britain itself brushed them aside in the past. Of course,
Swift is not being serious at all in this essay. Rather, his position is deliberately
created to highlight the callous and unsensitive way in which Britain was treating the
Irish famine.