Undocumented workers must be valuable to the economy. The people who employ them tend to be business owners who vote Republican, so they know the people they’re employing are creating profits, because those workers are creating profits for them.
In the early 2000s I had long conversations with a Republican-voting business owners who railed against ‘illegal immigration’, while employing them and therefore producing the conditions which incentivised them to become undocumented workers. His intellectual response was simply one of denial. He denied that his actions were hypocritical, or that he was creating the problem that he hated.
That was one of many important events that has led to me not assuming that compassion or moral integrity are commonly shown by humans.