Social issues...? What about political issues?
The societal issues would be nothing compared to the potential world-shaping consequences. Sure, bank accounts would be stolen, people would go crazy, blah blah blah, but what about the people with REAL power? The people in charge of well trained militaries, terrifying weapons, and powerful technology... these are the people who now have the world in their hands.
Before the event, uncertainty and "diplomacy" prevents these people from acting rashly and just attacking anyone they please. Now that there are no secrets, what happens? World powers would know all of each other's motives and secrets, and the secrets of all their enemies. The outcome of this could vary from total anarchy to the formation of a super government all based on timing and whether or not the right people ask the right questions. Do allies stay allies? Do new alliances form, or does everyone split apart? Does everything turn into a mess because nobody wants to listen to anyone anymore? Small seed events could thrust us down widely different paths. For instance, the United States could have their systems taken down by any number of people with the ability to do so now that secret systems are no longer secret. Sure, you can't just ask "what's the weak-point" and expect someone to know it, but given the amount of people who would like to hack into government systems, it's likely that SOMEONE would succeed. If our core systems are taken down at a critical time, we could be open for surprise attacks. You may say that surprise attacks wouldn't work, but knowing an attack is coming doesn't necessarily make you prepared for it, nor does it make your reflexes or tactical logic any better.
Really, anything is possible. World powers get nuked by
<insert enemy here>? Sure, if someone with the ability to do so acts rashly with their new powers. World powers retaliate with further nukes? Sure, if they're not a total mess or (again) the group of people with the ability to do so acts rashly. No nukes are launched and instead we're locked in a furious diplomacy stalemate? Sure, if people are overwhelmed with the influx of information and secrets. Small states all warring with each other? Sure; it's a micro version of world powers fighting with each other. It all comes down to what secrets are exposed and how the current governments react to such secrets, and how good they are at handling this information.
Oh, and social meltdown, but that's kind of irrelevant in the face of big bad enemies with lots of scary weapons.
I think that various governments would be OVERWHELMED with the completely unmanageable amount of problems they're now facing. Not only do they have to deal with the breakdown of society, all their own secrets getting loose, and all these new enemy secrets being discovered which warrant immediate action, they ALSO have to deal with single-minded enemies who are now more inclined to attack. Governments are in a panic with various members of staff all stressing over the constant revelations of new information (both that they discover themselves and what is brought up by others), and they stop functioning properly.
The first attacks made by enemies (doesn't matter who attacks whom) would put societal problems into perspective, and any working governments would become focused on external problems rather than trying to focus on all of them. Without regard for consequences (and because everyone is entirely over-stressed and jumps at the opportunity to focus and unite), governments of the world counter attack any potential enemies, and bolstered by their success, proceed to systematically wipe out all enemies of the nation. Various terrorist organizations are simply eradicated and any further resistance is met with retaliation. It doesn't matter that enemies know you're coming; if you're more powerful, you'll still win. Various nations are turned into military states to quell the massive social uprisings due to all the attacks, but are unsuccessful in maintaining it. All governments eventually break down, but we don't get thrust into thermo-nuclear war because systems aren't functioning anymore.
It's a typical anarchy scenario, but the aftermath's regrouping efforts would build an entirely different society. There's less emphasis on leadership and action and more emphasis on understanding. New societies are no longer formed around secrecy and greed. Property, wealth, none of that matters anymore, because you can't keep it to yourself properly. Those who are incapable of understanding become the minority; since they don't ask the right questions or don't listen to the answers, they can't survive with all these people who DO understand each other. These new societies are completely unrecognizable and live in relative peace, since misunderstandings are basically nonexistent. We become far more homogeneous in our thought processes and technology advances at a considerable rate due to the propagation of ideas.