The USA is so amazing that way. The most you'll get in Australia on a new application with no documentation is about A$500. And even that's a maybe.
Here, the banks really dislike giving you a decent limit to start with or raising credit limits when you actually want them to. They prefer to let their computers send out automated letters to good customers. So, once you have a card, the sky's the limit.
For example, while on the highest earnings I'd ever had, I asked a bank for a limit increase on my gold Visa, fully documented, and they declined it. Wouldn't give me a cent more. Since I lost that job, I've not worked much ... and they've sent me a series of "tick the box for an increase" letters which have increased my limit to more than triple what it was when they declined my request!