I personally found the episode in which Squidworth convinced SpongeBob to go on strike from Crusty's restaurant, followed by Crusty locking them out, a perfect analogy to the longshoreman's strike, complete with clueless signs. Excellent commentary there on union organizing, I thought.
Also Squidworth learned a lesson on conformity when he moved to the all-squid community and about went nuts because everyone did things exactly the same. Everyone played the clarinet badly. No one was amused by leafblowers.
As you can see, I have made an extensive analysis of this program, and its social ramifications.
Also, SpongeBob is asexual. He informed us in one episode that he reproduces by budding.
There's a dissertation in there somewhere, I can feel it. "Miss Marple, Ph.D" - that could work ;)
So said the Smiths' Morrissey. You can draw your own conclusions as to what that proclamation means!