When I was growing up, people typically used paper bags, newspaper, or directly disposed of trash in galvanized metal cans. We had no plastic bags. Few if any communities still manage waste in that manner.
Modern day trash collection services require that trash be in plastic bags before placing in provided containers to protect the containers and workers from contamination, and keep loose garbage from scattering across streets and lawns. The majority of this collected trash is taken to a landfill, where it is buried and compacted, which perpetuates plastic waste by hindering decomposition and creating a persistent source of environmental pollution.