You are giving for granted that there is a private someone that is payed to evict people from an house, but that's not how it works in many places in the world.

You are giving for granted that there is a private someone that is payed to evict people from an house, but that's not how it works in many places in the world. In Italy (and I bet in many other European countries) this is the public force that is in charge of doing this and there are a lots of exceptions (for instance, here, you cannot easily evict a family where there are children or sick people). And if you involve the pubic force, then you are inherently accepting the concept of a central trusted authority, hence the decentralisation fails as a requirement.