In my neighborhood, I often see parcel delivery trucks from 5 different transport companies wasting energy to drive to the same homes on the same day.

This is unregulated capitalism.

Then comes trash day, and 1 company arrives with 1 garbage truck and empties all the trash cans in 1 go.

This is regulated capitalism.

The municipality decided only 1 company could win the garbage truck service job. They offer up the job every couple of years, 1 company wins, and we all save CO2 emissions.