It's actually a different barrel of monkey shit when it comes to visitors instead of immigration. Poms, Scots and Irish have been big tourists here for years but in the 70's and 80's we became really popular for tourists from Japan, Taiwan etc, many came here to get their photos taken with kangaroos, but a lot of them came for the gambling. The Eastern states were big on allowing international guests into the casinos because they were big spenders, bigger than most locals. By the late 80's word had spread around Asia that our casinos were good for them and the Vietnamese started arriving by the plane loads just to gamble. The Vietnamese drove out the Japanese and quickly we had more Vietnamese gamblers paying even more money so of course the casino owners were happy. Then by the mid 90's the Chinese had decided they wanted a slice of our gambling pie and for the same reason the Japanese stopped making Australian casinos their go to place the Vietnamese did the same. 20 years on and now half our casinos are owned (minority share) by Chinese businessmen, we have secret deals going on in back rooms that allow the sharks to come here gamble millions and disappear without paying taxes, some without even having a trace they were here.
The tourist/immigration trends have been hugely different to the visiting trends.