The parish officials explained it like this:
Our property tax bills are made up of many different charges. They have taxes to support the school system, taxes to support road maintenance, taxes to pay for our parks, etc. People who don't have kids in school still have to pay to support the schools. People with no cars still have to pay to maintain the roads. People who never go to the park still have to help pay for the park. People with no sewerage still have to help pay for the sewerage. Like it or not, that how life works.