Most operators assume that because they know that by the time you've got the hours to move on you more than likely will. The wages/conditions are generally quite poor and it can be dangerous hard work at times.
People move onto "heavies" for many reasons. Conditions, pay, capital city, guaranteed performance if one goes quiet.
Flying in ga can be great fun and you see the very best of sights. Its the ultimate boys adventure but there comes a time when some of it starts to wear off.