What does the Grand Assembly debate and conclude? To what extent is this a valid response to the problem?

Gulliver's master attends a great assembly as the representative of his district. When he returns he tells Gulliver that they were discussing whether or not to exterminate the Yahoos-and that he suggested they be castrated when young, just as Gulliver told him horses in England often are. That way they will be easier to tame, and they will eventually die off. In the meantime, the Houyhnhnms can breed asses, which are much stronger and more manageable than Yahoos. If one thinks about humans in the context of the Yahoos, one can see the logic of breeding only the best. The irony is that we do this with all kinds of other species we deem "inferior".