Saying all these players go overseas and become world beaters because of their great systems just doesn't stand scrutiny. Yes, some players go overseas and become better players, some stay here and become better players, the majority of players improve as they move through their career until the age of about 28 (older for some forwards).
There are also numerous Australian players that go overseas and you never hear of them again, but we keep getting Mac Hanson thrown in our faces.
How many centres are the Tahs meant to pay top dollar? Last year they had Foketi, Perese, Tuipolotu, Walton and Wilson on their books, and if they paid them all top dollar you'd be complaining they couldn't manage their finances. I'm sure the Brumbies were in an identical situation with Hanson.