A Missed Oppurtunity

It is obvious that Prospero owns just about everyone on the island. It appears that he has saved Ariel from slavery of the witch Sycorax, but the act loses it nobility when he keeps Ariel for his own service. He keeps Ariel as an assistant for any of spirit or any other mystical work that he needs help with. Ariel performs practically every task or deed that Prospero needs to be done. Upon numerous requests Prospero denies Ariel his/her requests for freedom. When Prospero denies Ariel his freedom he is missing the opportunity to show that he does not run the island based on slavery. Instead of granting Ariel's wishes he continues to keep him for his services, and keeps him under his command. If Prospero had let a slave go he could have sent a message throughout the island. He could have showed everyone that not everyone on the island is a slave. If he did this he might have been able to calm some of the disgruntled voices that are arising on the island. Instead he sets himself up for the turmoil that will come. That is why this is a missed opportunity for Prospero. When someone ask to be released of their services you should release them...