I think a citation is needed, because I see a lot of cites of the opposite. One from a long list on a quick Google search:
http://www.pulse.ng/world/angela-merkel-germany-wealth-inequ...
http://www.france24.com/en/20170323-germany-wealth-inequalit...
http://www.dw.com/en/study-income-inequality-reaches-new-hig...
https://www.google.com/search?q=german+wealth+inequality&tbs...