From the Document: "Preserving key U.S. national security and economic interests is widely seen to depend on assured access and widespread use of space-based systems. Satellites are as essential to military and intelligence operations as fighters, warships, and combat vehicles. Major portions of the global economy rely on space systems; they facilitate the entire global financial system, stock markets, communications, agriculture, and transportation, as well as other commercial and civil activities. A June 2015 Department of Homeland Security report estimated $1.6 trillion of annual U.S. business revenues depend on satellites. Space systems are also a permanent and seamless component in the nation's critical infrastructure, as vital as the electrical grid or the highway system."
CRS In Focus, IF10337
Congressional Research Service: https://crsreports.congress.gov/