Quote 52
But my intention is very far from being confined to provide only for the children of professed beggars; it is of a much greater extent, and shall take in the whole number of infants at a certain age who are born of parents in effect as little able to support them as those who demand our charity in the streets. (3)
The narrator implies that poor parents don't deserve children, even suggesting that there should be a wealth cutoff. We're getting into dangerous territory, and we haven't even gotten to the proposal yet.
Quote 53
'Tis true, a child just dropped from its dam may be supported by her milk for a solar year (4)
The narrator doesn't want kids to mooch off of wealthier folks. Note the degrading language used to equate a child to an animal.
Quote 54
The number of souls in this kingdom being usually reckoned one million and half, of these I calculate there may be about two hundred thousand couple whose wives are breeders (6)
Referring to someone as a "breeder" might not get you past a first date. Used in this context, the word is meant to be dehumanizing.