My theory why this is not happening is the US at-will employment laws. Opening offices in foreign countries has a few downsides. In addition to the extra recurr

My theory why this is not happening is the US at-will employment laws. Opening offices in foreign countries has a few downsides. In addition to the extra recurring costs to rent a building, most (if not all) first and second world countries in the do not allow employment-at-will. Instead they require extensive documentation when someone is fired, and are subject to the wrath of employment tribunals. US companies want to eat their cake and have it too. By importing H-1B workers, they can fire them for any reason whatsoever. So it is more a question of low cost labor, and the flexibility to fire for any reason which is driving H-1B demand.