In the 1%, average income in Germany is 272k usd. In California, it's north of 1mil usd. At 0.1%, it's 1.1 mil usd in Germany and 3.2+ mil in California.
The distributions between high and low income earners are much flatter in Germany because it is harder to abuse the system to get to such salaries. No so in America. Hence Germany also does not need such aggressive taxation schemes as what's proposed (they also have way more flat taxes as well).