There is no or a very small impact of regulation on the number of exiled people coming in country.
However, making more people illegal let bosses exploit them more. Those workers could not sue their boss because of those regulations, and most conservative unions rely unfortunately too much on legal solutions.
So if a country couldn't limit immigrations, it could exploit more people and bybass human right with regulations against exiled people.
Yes, this is only positive for far-right bosses, and awful for others. But guess who decide in a capitalist economy ?
Not sure why you were downvoted, but this is a good point. In fact, I find it interesting that the US hasn't stopped pretending and just lifted the law against hiring illegal immigrants.
It's the main argument on how to stop illegal immigration, no one seems to talk about. Instead of building walls, jailing people or even shooting them for crossing the border, they should crack down on the people who hire them. To me it's just conservatives admitting that their opinions are just racist.
Sorry if you the conversation was about Europe. Just relating it to home.