Nothing wrong with that..Europe is already doing something like that on the basis of geography and probably religion...They have huddled together and everybody else is in the exclusion zone...Muslim countries can do the same,and find a similarity,that will be religion,or probably geographic location,as most Muslim countries are located in and around Middle Asia..The EU laws prohibit companies from outside EU to come to EU and establish business,same with people from outside EU to come in and find employment...Priority is given to businesses and personnel from within EU.Same can be done among Muslim countries,along same lines.They too should banish all those foreign corporate giants who are controlling all business in their countries..That will give opportunity to local businesses to flourish and prosper,and the money will remain in their hands.