I believe the something
is cheap labor — in particular they're striving to create what is, in effect, a slave caste.
This benefits their big corporation sponsors as well as allows them to build little fiefdoms.
I’ve said before, if “immigration reform” gets passed, minimum wage becomes a huge issue for the Democrats. Because it will drive down wages to the point that the public will demand that politicians “do something”. And talking about how it will kill entry level jobs won’t persuade anyone because those jobs will be going to foreigners anyway. So the Dems will offer raising the minimum wage to 12 or 15 an hour to “save the middle class”, and what will the GOP-e have to offer? Nada.