As i said, you can also put a gun to someone's head (law is based on the state's monopoly on violence).

However if you're the guy who writes the laws in australia, you have less (but still some) power over american corporations.

You're allowed to tell people what to do, but you can't make them do it, they can always choose not to. Worst case you get millions of people starving rather than doing what you try to make them do, like in communist Russia/China.