Who is going to fix the sewer when things get backed up? Some folks who do it just for the "reputation" as the best sewer jockey?
The sewer is getting backed up because it is defective. Some folks would gladly attain the "reputation" for being the Engineer that solved that problem.
Lamplighters used to light the gas lights every night but then someone came along with an electric light that did not require a Lamplighter. If your vision was correct we would all be in the dark too!