In a modest proposal Swift suggests the poor Irish children might be an overlooked commodity or

marketable product

Explanation:

Jonathan Swift was an Anglo-Irish who's also a poet, essayist and a cleric. He is popular for writing "A Modest Proposal," a satirical essay that sounded ironic.

The essay focused on different ways on how children of poor families can become less of a burden to their parents. During this time, there were so many poor families in the nation, that it became hard to feed them. He suggested that the children should be sold to rich families who can afford to give them clothing and food. In return, they can earn money while working for the wealthy people.

In this sense, Swift suggests the poor children might be an overlooked commodity or a marketable product. For him, it is something that the nation has to consider in order to improve the economic conditions.