Mystery solved. Thanks, Lamarca!

Now that final verse that no one sings:

But I'll try my luck for a cheque Out Back,
Then a last good-bye to the bush;
For my heart's away on the Outside Track,
On the track of the steerage push.

Does this mean that he's going out again to try to earn some money, and then follow his mates back to England when he can, rather than drinking to the bar-room wall?