I've read that the reactions to the auspicious event(Vaka-ı Hayriye) -that they even call it Vaka-ı Şerriye, exact opposite opposite of the Turkish term in the Balkans- from the Balkan population were very hard, there were some revolts regarding the aftermath of the event. I can imagine a few answers to this because the Janissarries were very influential in the Ottoman state and they could potentially take care of the interests of their origin places, but then my question becomes why the population was against the blood tax if this were the case? I mean, in other words, aren't opposing blood tax, and thus the recruitment of Janissarries, mutually exclusive with opposing to the disbandment of them?
While I can't answer your question, I want to point out that the devşirme (the so-called blood tax) had declined and ultimately vanished as a method of recruitment over the course of the seventeenth century. By the time of the destruction of the janissary corps in 1826, no janissary had been recruited by this method for over one hundred years. Janissaries by then were mostly of Muslim origin, and entered the corps by purchasing pay-tickets, which were sold on an essentially open market in the empire.
For more information, see Virginia Aksan's article, “Whatever Happened to the Janissaries? Mobilization for the 1768-1774 Russo-Ottoman War.” War in History 5 (1998): 23-36.