Have a look at the article below regarding migration into Qatar. The report contains some of the pull factors that attract foreign workers to Doha. There are 3 key points :
1.The economic importance of migration is clearly stated in terms of developing an LEDC as well as developing Qatar
2.The devastating problems that some migrants have faced due to man made and natural disasters
3.That migration and economic development are linked within a cycle. Towards the end of the article the world is potrayed as a system where countries are going through a cycle of out then in-migration, e.g. Ireland, as it develops.