Sure. It's mostly illegal in the US,too. But the FCC simply doesn't pursue the matter enough. Even in illegal things, like guys that setup a line pretending to be the IRS, the worst that happens is someone cuts some little account off.
It could be different. And as a carrier, I've begged other carriers to push. Have their end user escalate. Get LE involved and get them to go all the way till they find the originator of calls and nail em. But out of the few hundred "complaints" I've seen, only one or two even pretended to care, and none ever really followed up.
The US could kill illegal robo dialing, at least a lot if it, just by getting serious and slapping fines down.
It's so dumb, that even the FCC put out a prize for the best anti robo dialer tech someone could come up with. It defies explanation.