No chance. The cancer is so much out of control that killing it will kill the host.
Consider the magnitude of the task:
You have civilizational system which is leading humanity to a very bad place. If you try to tear the system down many [most?] will not survive. AT the same time within the system you have the following groups of people [in light of the discussion topic, not that there are generally 4 types of people you understand].
One - the greatest benefactors from the system - these people will spend any amount of energy and resource to keep the system going and convince everyone in the false dichotomy "our way or the highway". Those people control almost every leverage in society - media, politics, religion, business, armies, police, WMD, everything....
Two - the [common] people who swallowed the bait [how was the saying - hook, line and sinker?] of the system and will defend it with their lives. That is brilliant - pitching one group of slaves against the other. I have heard from such people that even reforming the banking system is "going back to the caves"?!?! They truly believe we [humanity] are doing it right and the only thing needed is....you know... to push a bit harder and it would work [definition of insanity - keep doing again and again that which obviously does not work].
Three - people who feel things are wrong but do not know the reasons or what exactly is wrong due to ignorance or lack of true data [or both]. It ain't easy to find your way in the endless propaganda and lies about the state of humanity and the true nature of our socioeconomic system. Not easy at all!!
Four - people who more or less have figured it out - a tiny minority, whose voices are drowned in the noise of the propaganda and the orthodoxy of the people from category 2.
We need to reform the system and change some of its most basic assumptions and goals, yet to achieve the good will for that we need people to understand that the system is damaging us. How will they understand [see above]. And again to repeat - catastrophic collapse is not an [sensible] option - too many will die.
I don't want someone to tell me the exact way to change the system. That will happen by itself if the people stop supporting and believing in the system. Just tell me how to show the truth to the majority of the people and increase the number of people in category 3 and 4.