A couple of counterpoints. I think you underestimate how difficult it can be to emigrate to another country without plenty of money (although it is relatively for EU citizens, rights the British have recently given up). Secondly, why should they leave rather than fight hard for change? The love it or leave it argument is so lazy.
> I think you underestimate how difficult it can be to emigrate to another country without plenty of money
I don't. My parent did it with nearly nothing. So did my grandparents before them. It isn't easy. Yet it is not impossible.
> why should they leave rather than fight hard for change?
It's a matter of degrees, right? I know people who hate the US to the bone and yet, they still live here. That's the kind of thing I don't understand. And, in the case of the couple of people I have in mind, money isn't problem at all.
Also, if you notice, I did mention the option to stay and fight for change is still there.
The question is one of what someone might want to have their life focus be about. I have to tell you that as you get older you tend to appreciate the idea of moving towards less drama and complexity in life. Why live life in a fever of anguish and dissatisfaction when other options might exist.
Also note that, philosophically speaking, my comment extends to situations related to working at a job or for a company one might not enjoy. One can stay and fight for change or just go. It's one of the most powerful expressions of freedom I can think of. They lose. You win. And someone (a nation or company) who might appreciate what you have to offer benefits from your decision.