HotLogic

I see what you are saying about factories and labs Mascrinthus, but I think you should keep in mind this is set in the future. The Laboratories in Gal Civ 2 are called upon to research a exceedingly broad array of technologies: banking, drive technologies, linguistics, terraformation, weapons and defenses and a slew of other varied things - they need to have their own workshops to bang out prototypes to test, not to mention future physics labs with the power to generate black holes et

I can only assume that the company that was contracted to build the trade good/galactic wonder goes bankrupt and then goes into liquidation. Everything on that tile is auctioned off for cents on the dollar of its full value and then the land itself is sold to a different developer and the previous structure(s) demolished. At the next local elections the Mayor of the Tile loses power after voters become angry with the giant boondoogle white elephant that the taxpayer's money was spent on turne