What would the people of the commonwealth do to reward anyone who could think up a solution to dealing with the large number of unwanted children in a "Modest Proposal"?

From the text:

Lastly, whoever will be at the pains to calculate the whole number of each letter in this treatise, and sum up the difference exactly between the several numbers, assigning the true natural cause for every such difference, the discoveries in the product will plentifully reward his labour.