A decent place so long as you don't like cannabis. They'll kill you for holding an ounce of it.
Discussion
Also I just realized this photo should be read in reverse. If you want to become a millionaire, you go and live in China or UK.
They are factories producing millionaires.
Respectfully, I don't think the lived experiences of the middle class in those places reflects "upward mobility" as you imply.
The map is not the territory 😉