I haven't seen number 1 actually "fix" Vienna's rental market? I mean it's not as crazy as other places, but I moved to Vienna in 2005 (since moved out) and it used to be a lot more affordable to rent in than today (even adjusting for inflation). So it's not that it's completely ineffective but it's not on it's own enough.
When people suggest that adding more new housing, either public or private, doesn't work, this is usually left out: how much housing actually was being added?
