Don't think its "dir", the national currency of Oman is the Omani Rial, which is linked to the US dollar. May be great if you are normally paid in Oz' rupees, Kiwi dollars or Rand, it still isn't enough to tempt me away from a salary in Uk pounds or Euros.
Don't get me wrong, Oman is a great place to live, the Head of ATC, if he hasn't retired yet, is Adullah Nasser Al Harthy, a great guy who worked his way up from being an assistant (in 1974), fully rated controller, and a good one at that!