If Koreans move into Southeast Asia in large numbers, they could sweep up the upper class

It is a fact that Asians in the Southeast Asian jungle have lower intelligence or a lower passion for education.
I know I'll be criticized as a racist, but even those who criticize me know the truth deep down.
As generations pass, the upper class will eventually be swept up by those of Korean descent, much like the Overseas Chinese.
Currently, Korea seems to be dealing with a shrinking population due to low birth rates by bringing in people from Southeast Asia.
In the long run, Southeast Asian descendants and mixed-race individuals will form the lower-middle class,
while a small number of pure-blooded Koreans will reign over the upper class, just like the Overseas Chinese.
Of course, there will also be a small number of pure-blooded Koreans who belong to the lower class, with low intelligence and low education levels, similar to white trash.