They say money doesn't buy happiness, but nobody believes that ,right? not in Sydney,anyway.But is our unquesnchable thirst for wealth and success making us miserable? yes, according to the Australian unity wellbeing index,which recently identified swanky Sydney as one of the saddest spots in Australia. Researchs found that Sydneysiders' feelings of insecurithy and isolation could be linked to the city's high population density,while the space,income equality and larger elerly population..........