I reckon that if what the OP suggests occurs (and no reason it can't/won't happen that I see) then we'll just have to find a way to cope until such time as the developers solve the issue for us (via releasing other resources, placing more junkpiles, changing the safe zone system, releasing more land from the green mist).

At the centre of all of this I believe that the developers don't want us playing a broken game. They'll find a way to fix it, then we'll find a way to break it again.