To actually answer your question there's several reasons why its always busy. I have never called the Unemployment office in New Jersey and not had to redial, redial, redail,. This step is normally repeated until you have gotten a ring, instead of "Due to the large amount of calls, we cannot take your call. Please, call back when... blah blah"(If you haven't hung up in the middle of the first sentence, you're wasting time.) Anyway, after you get through, you will have to wait 45 minutes, until your call is actually patched through to a human. The system is designed to filter out people with stupid questions and issues that aren't worth answering. They figure, if its not worth redialing seven thousand four hundred and sixty three times, and waiting forty five minutes to discuss, then it must not be too important.
THAT is the real answer. New Jersey doesn't care about its citizens
Ironic thing is, I could be spending the wasted 45 minutes and number of call backs looking for employment...