It's not reserved to German politicians but the EU democracy apparatus as a whole is broken to the core without any better alternative.

Politicians aren't incentivized to optimize for doing what's right for their constituencies or the greater good but instead they say whatever gets them (re)elected then do whatever their lobby friends who contribute to the party's fund tell them to do, while putting a positive spin on this for the great unwashed.

We have no system in place that holds politicians accountable for the damage they do throughout their careers.

Even when they are forced to resign due to various scandals, they often end up as "consultants" at the businesses they helped get rich with tax-payer money.