The buck stops with the cabinet secretary for lands/parliament . If i was to advise her/them on this, i would suggest to borrow from developed countries on how transfer of idle government lands is to be done through creation of land laws like Scotland and other countries are doing.
http://www.parliament.uk...nd%20Reform%20Paper.pdf
In a country like Kenya with rampant corruption and lack of meritocracy at decision making level, implementation and debate of such laws will of-course take huge political tangents but it would be worth the try.
In my day to day as an architect, i deal with land appropriation issues in countries around kenya eg rwanda whereby as the towns and cities are expanding, govt is allocating its land to private individuals for development. In such countries, the process is done within set rules/laws/guidelines that are fair. What lacks in Kenya is these laws that are deemed to be fair by all such that @alma and @xzk are given an equal chance to bid for the land. Its a tall order to imagine that govt will utilize all its prime lands in nairobi. fact is that govt will need to appropriate to private sector insted of the land lying idle and benefiting no one exept grasshoppers.
As Iron Sharpens Iron, So one Man Sharpens Another.