H1B employees are "at-will", and even in a more precarious situation with a sword of Damocles hanging by a thread over their heads. If they quit, they get sent

H1B employees are "at-will", and even in a more precarious situation with a sword of Damocles hanging by a thread over their heads. If they quit, they get sent back to their home country unless they arranged in advance for a different employer to sponsor them. If they are terminated, or laid off, they get sent back to their home country. It's fucked.