What's with a foreign degree in English?

I often find people doing their B.A. or M.A. in English, and then quickly go abroad to fetch another M.A. and come back. Most often, they go to places like India, Malaysia, Singapore, UK and Australia, and as they return home to the local job market, they find themselves in high demand as they initially expected. It has become a sure shot of laying hold on English faculty positions in the Departments of English in the private universities. The employers, also, hold people holding a 'foreign' degree in high esteem and prioritize them over other local candidates with national (therefore, mediocre?) degrees. Nobody knows why this is so, and there could be the following questions in the offing:

a) Do the Foreign Degree Holders (henceforth 'FDH') outperform the Local degree holders ('LDH') in the job interviews?

b) Are the FDH found to perform better than the LDH in the classrooms?

c) Are the FDH found to possess better hold on the subject than the LDH?

In order to find answers to these questions, extensive research is necessary. As these are important questions for the academia, mere social construct or gut feeling shouldn't be the rule of thumb. A foreign degree cannot and should not necessarily be deemed superior or preferable than a local degree of equal rank, and vice versa.

It's time we debunked this myth and recruit on the basis of merit and performance.