If the illegal aliens are naturalized won't they demand health care, retirement bennies, paid vacation, family leave and sick days? In fact they won't have to demand it the law would require it wouldn't it? The employers will let them go and hire all new illegal foreign nationals who will be coming here in a ratio of 3-1, like last time amnesty was granted, because of what they see has just happened. Again.
Plus don't forget that every one that receives amnesty will demand to bring their whole family and Grandpa and uncle Pedro, who then will demand to bring their wife's family and their cousin's family...and if they are citizens then they will probably win.
And when they get to vote in large numbers, especially in areas like California with majorities, they can change the laws to protect more illegals. And on it goes.