Managing demographic ageing and decarbonising the economy will also require major efforts in the coming years. The infrastructure needs both to be adapted to a post-fossil age and to meet the requirements of an ageing population. The education system also needs investment to deliver significantly better results in the future. New concepts must be developed in order to ensure prosperity in this country. The state plays a key role in all these tasks. It can indirectly stimulate private investment with its own investments, and it can provide favorable conditions and appropriate support measures for private investors.

Unfortunately, the German state has not carried out these tasks sufficiently since the early 2000s. Most recently, there has been some trend reversal in public investment, but previous increases of public investment have been too tentative, and implementation is not progressing fast enough. Overall, Germany is increasingly putting its own economic future and thus the prosperity of future generations at risk.

There is a considerable need for investment which adds up to at least €450 billion in the next ten years. In order to finance this volume of public investment, it is important to remove obstacles in the political decision-making processes and in financial relations between public subsectors. However, these reforms should not question the financial soundness of the state. The state should and can fulfil its central mandate to invest in the public capital stock and to stimulate private investments in a fiscally, economically and environmentally sustainable manner. A path is presented here that is constitutional and addresses both the temporal and financial dimensions.