A Victoria University study last year found that welfare fraudsters face a tougher time than tax evaders, even though tax evasion costs taxpayers three times more.
The study shows tax discrepancies cost the Government $1.24 billion in 2014, while welfare fraud cost the Government $30.6 million.
However, it showed tax evaders were far less likely to be investigated, prosecuted or imprisoned, and far more likely to have debts written off.
Associate Professor Lisa Marriott, at the time, said judges tended to denounce blue-collar criminals for the "seriousness" of their offending and recognise the "good character"of white-collar offenders.