Being German I want to pPoint out that the article leaves out one cruicial detail: Building your own home puts you into debt for quite literally the rest of your life. We do not like debt.
Yup. Germany has one of the lowest adoption rates of credit products such as the humble credit card out of nearly all Western nations. Debt is not liked. Edit: From the same site, the linked article at the bottom has the answer: http://qz.com/262595/why-germans-pay-cash-for-almost-everyth... A better link: http://www.businessinsider.com/you-have-to-understand-german...
Of course using your overdraft is totally fine, but using the evil credit cards even when paying in full is just like declaring bankruptcy. Doesn't help payment services in Germany that Visa/MasterCard is always considered an evil credit card and debit brands aren't too common.