Germany's population is getting older and older and smaller and smaller. To be able to finance our welfare system over the long term, we need more women in the workforce, more children and more immigrants.
Since loans are getting more expensive and there's less money available, we're seeing a commensurate decline in growth. Higher costs and lower growth, in turn, translate into lower profits. Figuratively speaking, in the future, we won't be able to run as far or jump as high as we used to.