I always here tax free!!! most of the things here are more expensive than in europe or us, instead of tax the profit margins are much higher put at the end you pay more.
here in dubai the don't increase prices by 5% they increase by 100%, have many examples.
the famous provident fund, after 7 years I have 80 us in the fund, how long will that last you when you retire? don't think you work here for 15-20 years and think you can have a nice retirement. if you join as an F/O you will use your savings till you become captain and that will take a while now.