Well, that "government policy" is the will of the taxpayers and voters who want to decide what happens to the city they live in and not just accept that living conditions imposed upon them by some bureaucrat. People in Guangzhou may be accustomed to living in Sim City, but that's not how it works in a democracy.
Personally, I've been to all three cities, and I wouldn't want to live in Guangzhou, compared to London or San Francisco.
People aren't robots to be warehoused.