The biggest problem really is the absolute lack of education that the population retains. If people would simply read on occasion (even just the damn newspaper!) and keep their reading skills above 4th grade people shouldn't have a problem with subs at all.
The problem is that people equate reading with unneccessary thinking. Read? Why? Fuck that yo i'll wait for the movie. I mean, if you ever listen to people try to read things out loud in public its agonizing, the don't know what half their reading means, they can't pronounce the other half and they read in spurts while their brain grinds hard to try and keep up.
Its pathetic.
Now, i'm not saying everyone has to go nucking futs and ALWAYS have a stack of books ready to read on a continual basis like i usually do but hell, read something even if its a book a month or a newspaper a couple of times a month. Theres no good reason why a 5th grader who keeps up with his class can read better them 80% of the adult population...