The Law Commission has raised concerns that the increasing use of financial penalties to punish white-collar criminals means they are being treated more favourably than "traditional criminal" offenders.
The commission said authorities like the Commerce Commission were increasingly resorting to financial, or pecuniary, penalties instead of criminal sanctions to deal with a range of commercial and financial offending such as insider trading, price fixing and money laundering.
The penalties could be substantial - up to $1 million for an individual or more than $10 million for a company. First used in legislation in 1986, they were now a feature of 15 Acts of Parliament.
The commission said one of the attractions of financial penalties for enforcement bodies was that they were easier to obtain than criminal convictions because as civil rather than criminal matters, they required a lower standard of proof and more relaxed rules of evidence and procedure.
However, while potentially large, the penalties could also have benefits for offenders.