The Government in Alex's world is rather Machiavellian, and will do anything to ensure its own survival as well as the stability of the State. To that end, it does not blink twice employing questionable scientific techniques to manipulate its citizens into becoming moral exemplars. The manipulation technique used on Alex is called Ludovico's Technique, or basically, behavioral modification through associative learning.
Forcing Alex to undergo the Reclamation Treatment is just one out of the many ways the Government manipulates its citizens to ensure stability in the State.
Alex is forced to endure Ludovico's Technique, which employs the principles of associative learning, whereby a person's behavior is modified through prolonged manipulation of her normal responses to select stimuli. In this day and age, Ludovico's Technique would be considered torture, or at least the unethical treatment of criminals.