A Modest Proposal: brought to you by lazy folks. Swift's sole purpose in writing this satire is to get people talking, moving, and doing just about anything but sitting around with the crossword puzzle. Since this is a Juvenalian satire, you know that Swift won't be taking it easy on the landlords who kick back and raise the rents on their poverty-stricken tenants. He especially likes linking vanity to idleness. In other words, the wealthy spend all their time primping and eating fine dishes while the poor consider human sacrifice to survive.
Swift feels that the satire form allows him to critique his readers' laziness.
A Modest Proposal purposefully exaggerates the lack of English action. No one would have given it much thought otherwise.