Car salesmen have been found to be the least ethical and honest professionals. For more than 30 years, the salesmen have held the last place among trusted professionals.
Other professionals who are scraping along the bottom are advertisers, real estate agents and state MPs, the Sydney Morning Herald reported.
The latest Roy Morgan "Image of Professions" survey asked people to rate or score people in various occupations for their honesty and ethical standards.
The telephone survey was conducted with 645 women and men aged 14 and over.
In the survey, nurses came out on top, with 90 percent of respondents rating their profession as the most ethical and honest, doctors (88 percent), pharmacists (84 percent), engineers (76 percent) and school teachers (76 percent) followed.
Pharmacists suffered largest decline in confidence, dropping 4 percentage points.
In the financial world, accountants remained the most respected, with 49 percent of those surveyed believing they are ethical and honest, they were followed by bank managers (38 percent) and directors of public companies (26 percent).
Only 25 percent of respondents believed that financial planners were ethical and honest.
Ministers of religion have improved their image by 1 percentage point, to 44 percent.