What is swifts main purpose in a modest proposal?

Swift's main purpose in "A Modest Proposal" is to satirize the British government's treatment of the Irish people and highlight the economic and social injustices faced by the Irish. He uses irony and exaggeration to critique the oppressive policies imposed by the British, suggesting a "modest proposal" to alleviate poverty in Ireland by proposing Irish infants be sold as food to wealthy English landlords.