Apart from Speith who would've been under contract to come out again, and some unorthodox American amateur, the only other international I think that came out was Brandt Snedeker. So obviously Adam Scotts efforts (being a recent number 1 in the world) to promote the game and attract international talent is futile.
So obviously people think our Aussie golfers should come back to play with the local pros to promote the game to them and encourage them and young (& old) Australians to take up golf.
I'm not sure what I think of this idea. Apart from the world cup and presidents cup, we will never have the pull to see the best in the world come here regularly. Thankfully, state governments have worked to attract these events for Australians to see them recently. I think its good our players come back to promote the local tour and game. If Jason didn't come out for a decade I'd be disappointed but I don't begrudge any of our international stars who don't play out here every year. Its their lives and their choice, although I do enjoy seeing them come out.
In Jason Days case, he's had huge battles with his health, (from vertigo, to his back and thumb..) and well as starting a young family, establishing themselves overseas and generally he has had to work out what works for him to deliver his best (apparently keeping it close to home with him preferring to have his family close and stay in a motorhome as opposed to leaving them and living out a suitcase/hotels/airports etc). I wouldn't be surprised to see him out over the next couple of years after his family is a bit older and he has delivered us much joy with his performances.