Do the powers that be really want it fixed though?
America get's to brain drain the world, and put that talent to use in our defense and military complex. We use illegal immigration to compete with foreign companies with lesser labor laws, and also bolsters the wealth of the American business class. Defense of minorities and "the other" constantly feeds into the liberal platform which uses social issues to get in the office war hawks. Immigrants are the forever scapegoat for American industry which takes the heat off of corporate America, and is the feeds into the conservative platform which uses the social issue to get in war hawks as well. Oh and America can constantly flaunt being for dreamers and how America is about joining a patriotic set of values, while also having a hard litmus test that encourages people to come illegally (and are often incentivized to.) Between most immigrants being younger, and the deportation department being twitchy, it seems America cycles in a cheap workforce of people who would be at the top of their game as far as efficient competency and not yet burned out. Everyone wants to slave for the world's greatest reserve currency even when it's a bad deal.