An Australian Mafia boss allegedly paid $2.2 million in bribes to judges to get lighter jail sentences, and the Mafia have approached defence force personnel to supply them with military grade weapons, top-secret police intelligence reports reveal.

The reports also reveal the price of some food - including the price of certain types of seafood in Sydney - may be more expensive due to Mafia control of the supply chain across Australia.

Fairfax Media can also reveal that Jupiter's Casino on the Gold Coast has become a key gambling site for Mafia figures banned over money laundering concerns from Crown Casino in Melbourne and Star City in Sydney.

Two top crime figures, including a Mafia godfather, banned from the Sydney and Melbourne casinos recently gambled large amounts at Jupiter's, effectively rendering anti-money laundering efforts useless.