[ChuckNorris89]

>parents tend to help out with the down payment. The more you get from your parents, the closer to the city center you can live.

Oh, so the "secret" to Swedish housing affordability is 'have rich parents'. Silly me, why didn't I know that sooner, I would have shopped around for richer parents. /s

>I wonder what kind of social effects it will have

The short term effect will be a much bigger class divide between those with rich parents and those without, basically a ghettoization of cities (which is already a thing in most EU cities), while long term maybe more social unrest, crime, political extremism, etc.