TEFL teachers are drawn to Saudi Arabia by the lucrative tax-free salary* and other contractual benefits. Whatever you have heard about the KSA, many teachers who have adapted to the environment return again and again, particularly those who have enjoyed a very comfortable life on a compound, along with activities such as scuba diving off the coast of Jeddah, or excursions to Bahrain, Qatar, Kuwait and/or the UAE. The KSA also offers the possibility for promotion in areas of TEFL which might not be so readily accessible elsewhere such as curriculum development, Quality Assurance, and even Academic Training Manager (ATM) which has a similar role to that of a headmaster.
*Unfortunately, this does not apply to Canadians who are taxed at home, but often the salary factors this in to the final package.