“There has to be a big stick and a big carrot here,” he argues. “If these buildings aren’t fully in use, then why not? You should encourage people to either develop them, or, if they’re not in a financial situation then sell or give them to people who can. Maybe that means an enormous empty buildings tax.”
Source: https://www.bbc.com/news/articles/cdxz0enqykgo?at_medium=RSS&at_campaign=rss