Litter doesn't hurt anyone. Litter is a breeding ground for fire and disease. Litter impacts car insurance rates because thousands of auto accidents are litter-related. Ingesting litter causes injury or death to thousands of pets, wild and farm animals. Litter doesn't affect the economy.
Litter discourages economic development because it impacts real estate values.
Good stores and important businesses will not locate in a community which lacks the pride to effectively control litter.