I don’t really know how you can threaten someone when you need them more than they need you.

If you leave town, where are you going to go? The city doesn’t need you. If you’re not making what you want/need here, go ahead, leave, the city won’t be hurt by it. You will, though. Because you’ll have to pack up your business, set it up somewhere else, and hope that they do the things you want them to. It’ll be expensive for you, won’t mean a thing to the city.

So how is it a threat?