1) You would have to explain how the problem of existing structures account for the orders of magnitude cost of new construction. 2) Why is this any different

1) You would have to explain how the problem of existing structures account for the orders of magnitude cost of new construction. 2) Why is this any different now than at the times of the examples? It would seem as though, if you initiate a project, you would have an incentive to complete it within your term in office. This could have been accomplished with many of the historical projects cited - Empire State Building, Golden Gate bridge, man on the moon (mostly).