It is true that the narrator of Jonathan Swift's "A Modest Proposal" does not mention morals; however, just because he never mentions the word does not mean he avoids the subject. In fact, it seems to me that his sense of moral justice is what prompts his "modest proposal."
Consider the reasons he gives for wanting to enact a change. Too many women who have too many children are reduced to begging in the streets and doorways for their survival. The children, as they get older, are forced to become thieves because there is no honest work for them, to become paid soldiers for a foreign army, or to sell themselves off as indentured servants. The cause of these deplorable problems is a lack of interest by the government, and this is, indeed, a moral issue.
The narrator certainly discusses a moral issue in paragraph five when he talks about a great immorality which the women of his country are perpetrating on the innocent:
those voluntary abortions, and that horrid practice of women murdering...
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