It was always source of contention in Britain (net contributor). Germany doesn’t care for some reason.
Maybe in future they will
Germany (and France) benefit from the EU because they dominate the EU politically and the rules governing finance, trade, and the Euro are rigged in their favor. On the whole, their monetary contribution to the EU is smaller than their net benefit from the arrangement. When Britain was in the EU, they found that the benefits of EU membership were less than what they had to pay.