What is a major economic expense for Germany?

The major economic expense for Germany is the cost of reunification, which has been estimated at around €2 trillion since 1990. This includes the cost of rebuilding East Germany's infrastructure, as well as the cost of providing social welfare to East Germans who lost their jobs or were forced to retire early. The cost of reunification has been a significant burden on the German economy, and has contributed to the country's high level of public debt.