Since the A-League's inception in 2005, Australian clubs have not exactly found it impossible to lure big names Down Under.
And Kewell believes more of the same is required if the clubs and the competition as a whole wishes to capitalise on the growth spurt the sport is currently undergoing within the country.
"The A-League is firing up, it's creating a stir," Kewell said.
"A lot more people in Europe, you know a lot more players are questioning it and thinking 'what's it like?'.
"It's a beautiful country to play football in and it's got the weather, it's got the fan base, it just needs about half a dozen European stars to come over here and then maybe it can really kick on."
And Kewell, who is without a club after being released by Liverpool, has not ruled out the possibility of returning to Australia.
"It's something that I would always consider," said the 29-year-old.
Kewell and his fellow foreign-based Socceroos are firmly behind the bid, and he said: "For 2018 I think it would be a tragedy if we didn't get it. We've got to try to give it our all and go out there and push it."