Ok, I get it.
Thank you for explaining this to me.
"Private property, properly recorded in a national system, is the basis of the American system, which extends also to naturalized persons such as corporations. While it exists in Central and South America, those two lack a national system of recordation, which gives rise to shantytown development."
Like you made clear in your last post, this phenomena exists in many parts of the world.
In Sweden however, I think it would be impossible.
Swedes, even jobless ones, disabled persons or other individuals unable to get a decent job have been very successful in their demands of a standard of housing equal to the rest of the population.
Just look at condos and houses in Sweden. Probably the best built in the world. To build in a different way is prohibited by law.
A factor that might be of interest is the proportion who rent or live in gov't housing versus those who own their own home.