Was the German pension system built to bust?

Germany is growing older and the pressure on the German pension system is increasing. The younger generation won't be able to make up the difference, and economists think the elderly should foot the bill.

source https://www.dw.com/en/was-the-german-pension-system-built-to-bust/a-73892898?maca=en-rss-en-ger-1023-rdf