Oh no, they built tons of cheap affordable housing. How terrible of them! I’d be interested to hear the viewpoints of Sicilians on this one
Yes, the mafia built housing, but it’s not the kind of social housing we might hope for—it’s mostly slum-like. Of course, the city of Palermo is also EXTREMELY densely populated—I read something like the fourth-most densely populated city in Europe in a magazine once, but can’t source that now, so take it with a grain of salt.
Nota bene: I’m not Italian myself; my wife’s family has their roots in Sicily.
[1] https://www.marememoriaviva.it/ (website only (?) in Italian)