I predict that Qatar and other GCC new countries will start to decline when:
- Asia starts providing better conditions to their poorest citizens - supply of cheap labor will no longer be available and therefore limited people to maintain the overdevelopment will be available, causing the abandon of many of the unnecessary infrastructures, easily deteriorate by the harsh summer heat;
- The need for oil and gas will substantially diminish - no longer will the easy extravagant income be available to pay expats nor will the government survive without taxes;
- Africa and South America starts to attract expats and labor due to its sustainable development- two continents to develop with much more attractive and human friendly weather, colorful cultures and historical heritage, providing a much more attractive environment and life style for locals and expats alike;

Qatar without cheap labor and limited income will see massive exodus of expats and locals leaving the country back to Mother Nature.

This is a scenario that has high chances of happening, as the country, even today with its enormous wealth, cannot survive without expats.
Expats only come here because of the money, not because of the nature, weather or social atmosphere.
The moment expats and laborers stop coming, it will be the beginning of the end!

PS. Don’t delete this, come and read it in 2030 and you will see what I meant!