Yes with no real retirement in the future :) All social benefits and retirements will collapse and %100 not sustainable not only for Germany but for so many nations. Many reason exist already and it just takes longer.

German welfare state is worth paying it, it just needs to become more efficient. I don’t miss lower taxes I enjoyed in other countries, because I see the difference. And, anyway, high taxes hit upper middle class the most, for majority of population it’s not the biggest concern — rent is.