But a significant reduction would make the proposed system meaningless from a cost benefit perspective. I already see this system as having no real benefit. Trash is $250/year and sewer is $1250/year, so this new sewer-like proposal will likely be more expensive than it is now.

This is just the systems thinking approach. Who cares about transporting trash if you still have all the other problems, like dumping it in landfills. It's better to think about the entire system and make changes that benefit us on multiple levels. If you aren't willing to talk about the entire problem space, then that tells me something about the quality of the proposal...