Why did the towns person not fit into the manor system?

Manorial system (mənôr´ēəl, măn–) or seignorial system (sēnyôr´ēəl), economic and social system of medieval Europe under which peasants' land tenure and production were regulated, and local justice and taxation were administered. The system was intimately related to feudalism but was not itself feudal, since it had no connection with the military and political concept of the fief. The fundamental characteristic of the manorial system was economic—the peasants held land from the lord (Fr. seigneur) of an estate in return for fixed dues in kind, money, and services. The manorial system prevailed in France, England, Germany, Spain, and Italy and far into Eastern Europe. A similar method of landholding by the peasants has existed in countries outside Europe, notably Japan and India. 

Jonathan swift is using a satirical approach to make awareness to the fact that there are too many beggars (which include women and young children) on the streets. his solution? eat the children. yes this sounds like the craziest thing in the world but it's a solution. the children could be sold to landlords to pay rent and the family could have stuffed bellies. he lists the advantages, disadvantages, and the rebuttal to the disadvantages to support his claim. he also suggest what age should be the highest price and how to cook them. in the end, he excludes himself from his solution. all i all, swift uses a satirical approach to get people aware of the beggars that flood their streets.if you need more for "a modest proposal", i am here.