This risks get a bit away from Mobilereading concerns, but, Google's New York City expansion is being achieved without any corporate welfare that I can find mentioned in articles like this:
http://gothamist.com/2018/12/17/goog...are_campus.php
Lots of people just don't want to live outside New York City. I presume a lot of tech companies know this and have development offices there, for that reason, without need for some kind of bribe-taking. Another option is to let people work from home with your office located in a cheaper location. But this impairs teamwork.