Later just doesnt work as developers wont be able to make a profit so they wont build. Most of the 'profit' (plus or minus some risk premium depending on site/l

Later just doesnt work as developers wont be able to make a profit so they wont build. Most of the 'profit' (plus or minus some risk premium depending on site/location/timeframe purchased/etc.) will have already gone to whoever sold their land to the developer so government will find it impossible to extract in the same way