As others have mentioned, it's no secret that he just likes living in Glasgow  and that he loves the club. Despite the usual bitching about Lennon from some on here, no one has yet mentioned that this is the year that Celtic might do 10 in a row.

Considering he's been around the club for so long, it would hardly be surprising if he wanted to be part of that moment if they get there. 

There is going to be an inevitable exodus of talent after this season anyway regardless of what happens and maybe he'll move away as well.

There is still time for him to play in a bigger league if he wants to but it's hardly going to be influenced by some moaning by the Australian press.