The phrase "economic lifeline" refers to something that plays a vital role in sustaining or supporting an economy. It is a crucial component that helps keep businesses, industries, or communities functioning and thriving financially. Full definition
«By speeding repairs to flood - damaged roads and bridges that are economic lifelines for travelers and a variety of commercial shippers in the Los Angeles area and points beyond, we can help the thousands who depend on this route through Death Valley,» said Secretary Foxx. (transportation.gov)
The Defence Headquarters (DHQ) said yesterday that it will ensure total protection of oil platforms and gas pipelines in the Niger Delta noting that it has observed with dismay the unpatriotic attacks on the nation's economic lifeline in the Niger -LSB-...] (securitykingng.org)