In the name of "Land bank" and property bank, people are hoarding scores of land and property ... I think the real break down will happen, if Government regulates this market, and puts proper tax even on the 5000 vacant properties - after all, these are properties being owned by individuals (Officially 5000 vacant, but every builder would have at the minimum 3-4 flats constructed illegally, so I'm sure the number of vacant apartments is more than 5000)
