Convicted fraudster Michael Williamson has lost his appeal to have his jail sentence reduced. The former head of the Health Services Union and one-time national president of the ALP, is serving a minimum of five years for ripping off the HSU and trying to hinder the police investigation. Williamson had argued that the trial judge had erred in “overstating the seriousness of the offence” and that he had not taken into account his mental health condition.