You know what would solve the massive economic issues of HK? Integration into the mainland. The central government cannot and does not seem to want to rush that, because it's politically infeasible, Hong Kongers do not want to give up their special position despite the basis of it - its economic significance within China - being greatly diminished.
That's completely backwards. Hong Kong's economic privilege comes from the fact that it is (rather, was) a stable jurisdiction with rule of law, an independent judiciary, and relatively low corruption that international businesses can trust. In other words, not being China. If Hong Kong was just another Chinese city, it would be completely eclipsed by Shanghai.