Cynbob,
Humans as rational individuals need to grow, learn, develop, create, share and progress. The degree of this process depends on its self awareness as well as its extent on each individual.
If Doha offers enough to the individual to "grow" within his own needs, then he/she tend to remain, otherwise he/she will feel discomfort until their departure.

As they say:
"Once you have opened your eyes, you can no longer close them".
Once you've lived in New York (as an example), you can no longer pretend that you have the right to express you self, be respected and have rights as a citizen, create, critical review the world you live in, etc, etc, etc......