How do we get American employers to fear prison if illegal is found working in their building?

Americans that hire illegals seem to be treated like victims. Americans are all about going after the illegal workers but I don't see governors sending troops to businesses that hire illegals. I worked for a furniture warehouse near ohare in Chicago full of illegals. These are not jobs Americans won't do, these are forklift order pulling jobs. If they were short handed there was even a temp service to order up a few illegal workers. They are so fresh they still leave used toilet paper in pile next to toilet from poor plumbing at home country. I called from ICE to the news and nothing happen. Even if ICE did come it would be to attack the illegals but not the owners. If you harbor illegals at your house you will go to jail but not if you keep them at your business, just say you did not know and your free. Unions have ways to double check employees so should the non union companies.