100's

Normal people carry $50 and $20 notes because that is what ATM's spit out. Hundreds are carried exclusively by dodgy people. If you are carrying a hundred dollar note chances are you are a drug dealer or some sort of tax evader. They should really implant tracking devices on $100 notes or at least make them with ink that bleeds all over you. That way the drug squad and auditors from the ATO could then easily identify dodgy people. In a matter of months we could win the drug war and massively increase taxation revenues by making tradies who do cashies pay their far share.