Yes, there has been a long discussion on what to do with these buildings. Some experts wanted to raze them to the ground and build new ones, but the easier (temporary) solution of renovation was chosen, because it would require too much of government funds and there are also law issues as there isn't many legal means to move stubborn flat owners from their property if they don't do want to and as mostly elders live in these places now (many of them even since it was built), this is a big issue.