People will always go somewhere else if they can get a better deal there...or if they think they can.

For instance, Amos goes down to Mexico to get his dental work done, and so do many other Americans. Why? Because they get a way better deal there, that's why. This works out well for both the Mexican dentists and the Americans who go down there. There are a number of forms of medical treatment (both conventional and alternative) in Mexico and various other countries which attract people from the USA and Canada...either because of the price or because it's a form of treatment you can't get in the USA and Canada, because it's been shut out by our medical organizations like the AMA.

Latinos try to get into the USA and Canada mostly to raise their standard of living, sometimes to escape oppressive regimes and other unpleasant conditions.

Similarly, there is a steady flow of Asians and Africans to more prosperous regions in Asia, North America, Europe, and so on.

Every country wants only so much immigration at any given time...enough to provide cheap labour...not so much that it destabilizes the society. Private industry in particular is very desirous of the cheap (and hardworking) labour provided by immigrants, who are usually more motivated to work hard than the domestic population is.

That makes it one hell of a complicated situation, doesn't it, Rig?

Immigration is neither a good thing nor a bad thing in itself...it just depends how much of it you get at any given time, and how it is controlled and regulated.