It's a bit late now to want justice. Deals are done, money has changed hands (often vast amounts, and from public to private hands), and the bubble has come and gone. The status quo is set and there is really very little that can be done about it. It's not so much that the banks are too big to fail, it's that the system is too big to fail. I don't think half the people working in finance actually understands it, and more than half probably don't understand (and therefore don't follow) the regulations, or interpret it to suit their own needs. We let it happen.
The only ones who felt the effects of this slow and often subtle squeeze are those at the bottom of the barrel, but only now do we realise that we were too complacent. I think people want to believe that it will all go away, that as long as they work hard and earn their keep, it won't be them on the streets shouting about pensions being cut to a quarter. People characterise those who march as 'lazy', as those that chose not to work, probably to cash in on this opportunity for social superiority. Humans are petty like that. We always like to think there are those who are worse than us, worse off and worse for it because they are worse people. We like to forget that these people could have easily been us had the domino fell another way.
People still believe in the system, especially those who survived the paranoia of the Cold War. It seems odd to a lot of us now that people would hold on to the establishment and system that hoodwinked them and their fellow man, then passed off the debt onto us, but it's a deep seated need to protect capitalism. What is laughable of course is that those we're trying to defend it against (communists) are practicing it better than we preach (look at China's market strength).
Protecting capitalism and the system we worked for means protecting the investment and futures that these people have worked for. The system is working still for some, and the majority are happy with the minor exploitation they suffer around the middle, it's hard to give up on that for something unknown and untested, and at worst might bring your own happy bubble bursting around you. We all know the banks were at fault, but we like to blame the people who interacted with them. Banks have to be safe, or our money isn't safe. Banks can't fail, or our pensions, our nest eggs, our trustfunds and retirement funds will disappear into smoke. The magic trick works because people want to believe. Punishing the banks, letting them fail, that just can't happen. Those with more savings will be more scared and squeal louder, this won't change.