Some shower thought: Mars is outside all jurisdictions. Crime on Mars is not possible at the moment. There are no governments on Mars. Meaning, no taxes either.

Some shower thought: Mars is outside all jurisdictions. Crime on Mars is not possible at the moment. There are no governments on Mars. Meaning, no taxes either. Mars may become some sort of tax haven, and companies will move their HQs to Mars to avoid taxes. But then, you won't be able to receive correspondence on Mars. Then, extradition from Mars would be so expensive it would not be even feasible.