Reagan's plan wasn't that bad but it got changed by others. Reagan only meant to legalize a couple hundred thousand, not over 3 million most who weren't here working. Reagan's plan was that the illegal had to prove they had been here working for 5 years but all that was changed so they didn't have to prove anything. If just the few who have worked hard and never accesses a single government service and always paid their own way for everything were to be given amnesty this time it wouldn't be so bad but it wouldn't work that way.
The only thing that came out of it was Mexico now has more influence in our political process than even England had at the time of the Revolution. If we give another amnesty, might as well just say goodbye to the Southwest and be done with it.