The Constitution enumerates certain powers which are reserved to the federal goverment and other powers which are delegated to the state.
Those powers which are not explicitly related in the document to any of the goverment levels will automatically be reserved to and exercised by the supreme federal goverment.
The GDR stated it was constructed as an "antifascist protection mechanism" in order to keep out external threats and keep the east Berliners safe in their "Socialist Paradise" but in reality it was to keep people in since many were trying to emigrate out of the communist zone and the GDR would fall because of emigration.
So that one part of the gov. wouldn’t have all of the power.
Answer:
the government has many roles in the US economy like other businesses, the government spends and makes ,money,consumes good and services, and employs people
