blaqdog said, "What's funnier is that with tax, I'm still earning more in Australia than I will be if I take this offer in Qatar."

Then why move in the first place? Qatar is not a walk in the park. There are many challenges to working there, not just the open oven for 8 months of a year, which those from developed countries like yours will take quite a lot of getting used to.

Anyway, all the best in the proposed salary upgrade.