In real life, you would not get fired if you went on strike because it's illegal to hire new workers if your other employees are on strike.
Mr. Krabs is making his employees pay for breathing, yet in the episode "Pressure," when Sandy thinks land creatures are better than sea creatures, he says it's free. However, he may have started charging his customers and employees for that at some point between "Pressure" and this episode.
SpongeBob has said he loved the Krusty Krab many times so it is unknown how he destroyed it without showing regret.
Whenever there is a crowd going to the Krusty Krab, they run over Squidward.
Every time Squidward hears the word 'Forever' from SpongeBob, he is in shock, and the word echoes in his head.
The running gag, when the term "forever", was in Squidward's mind was a youtube meme.
Squidward and Mr. Krabs are in their day clothes when they enter the destroyed Krusty Krab, but when they left Squidward's house, they were wearing their pajamas.
During the part where Squidward imagines himself as an old man, when it begins his sign reads "Krusty Still Unfair", but when Spongebob starts orbiting around Squidward, it reads "Krabs Still Unfair".
In part of the episode it shows Squidward and SpongeBob really old on strike. Yet at that age, Mr. Krabs would most likely be dead.
SpongeBob and Squidward are invertebrates, and therefore would have no skeletons to rot away to.
In the episode "Nature Pants," "Patty Hype," and "As Seen on TV," SpongeBob willingly quits his job and throws his hat down. However, in this episode, he says that the hat is his "friend" and cannot bear to discard it.
When Squidward said "and more", SpongeBob only had one tooth for that scene.
In the scene where SpongeBob and Squidward were outside the Krusty Krab after getting fired, they were still wearing their work hats.
When SpongeBob runs to the Krusty Krab to "dismantle the establishment", the sky looks like dawn is breaking. When he goes inside, it looks like nighttime again.
When Squidward receives the underwhere the noise with the flies is heard however mr. Krabs stated that that's his dry cleaning so they have been washed