Same as other commenter: Switzerland is SO expensive. Of course the salaries are higher, but damn. You can get away with spending very little in Germany, and saving a higher percentage of your salary.

Of course, the best hack is to live in Germany but work in Switzerland.

Because it is well-known that the Swiss people are not fond of German immigrants. While I feel that Germany and Austria have a rather similar culture (though I'm probably biased here since my father is Austrian), the there is a much larger difference in culture (and German language) between Germany and Switzerland.". While the Germans hardly have problems with Swiss people, the other direction is more complicated. Just google for 'Schweiz Fremdenfeindlichkeit gegen Deutsche' to get lots of German articles about this.

Also the living expensess are much higher in Switzerland. As a rule of thumb I have heard: "If you get two times in Switzerland of what you get in Germany: Take the job. If it is much less: don't.".