It is all about risk vs reward. Illegals are willing to work and do stuff that other workers won't do. So the owners end up saving money. If immigration busts t

It is all about risk vs reward. Illegals are willing to work and do stuff that other workers won't do. So the owners end up saving money. If immigration busts them then they get fined and then they replace the workers. The amount saved vs the payment of the fine still nets them savings. Immigration does not enforce the law thoroughly.