They will want voting rights, welfare, and then they will demand citizenship, and open borders.
America will then slowly morph into a third world, banana republic.
We have had a guest worker program since 1952.
We have ag worker visas, non-ag worker visas, tech worker visas, nurse visas, and crew worker visas.
Already happening in California. The "gated" ones don't worry about the invasion, their children go to private schools, they have the finest medical care, they hire illegal aliens, and they don't worry about increased taxes.
This mess is affecting the middle class and blue collar workers, who are forced to pay the bills for illegal aliens while they're struggling to pay for their own families and mortgages. Many have lost their jobs to illegal aliens.
Just like the third world, the rich and the poor, and the middle is dwindling. It's sick.