I don't know that much about German immigration, but many European countries are harder to get residence in than the US. Also, most people in HK speak at least some English but hardly anybody speaks German. I doubt it would be much of an "easier go" except for people working in high paid jobs in desirable fields (who would probably go to the US or Canada).
It's not that special of a case. For as much as people in the US complain about their government, most of the world is much worse.