Legal layman here, why is it I keep hearing of American companies suing regulators? I can’t recall that ever being the case in Australia, unless they’re claiming some law/regulation is unconstitutional or something.

Am I just ill informed? Seems weird.

Regulator is empowered by the law, law is made by legislators, unless it’s against the constitution of your country, surely the answer to any of these cases is: tough shit, company? No? How do they sue a regulator for regulating? Seems weird.