Why does Jonathan swift use satire in a modest proposal?

Jonathan Swift uses satire in "A Modest Proposal" to highlight the absurdity of British economic and social policies that were contributing to the impoverished conditions in Ireland. By presenting a horrific solution to the problem of poverty (suggesting that the Irish should sell their children as food), Swift aims to shock readers into recognizing the inhumanity of the situation and to spur action for real solutions. The use of satire allows Swift to criticize the oppressive attitudes of the ruling class in a way that is sharp, effective, and memorable.