The problem here isn't money, it isn't bankers, it isn't fair taxation etc, it's Power.
Those of us who are not in power have a fundamentally incorrect view of the world - that the world is essentially a 'fair' place where everyone should 'do the right thing' and the universe naturally rewards you for being a decent, hardworking individual.
This is complete and utter tosh and the people at the top of society with all the wealth and associated trappings are just the people who realised this first. They didn't make the power structures of our society what they are (ok so they may have tweaked some in their favour) they simply know better than the rest of us how to ride the waves and keep hold of their money and status.
Until the vast majority of people realise that being nice/decent/hardworking does NOT equate to being successful in this world we will never have equality in the distribution of wealth or influence or power and the cycle of boom and bust will continue decade after decade.