[dragontamer]

Because certain issues are geographical in nature, especially at the local level.

Should a new highway replace the housing development over there? Well, people who live close to that housing development might care one way or the other (Noise complaints, Ecological issues, Traffic Issues). People who live very far away from that center probably don't care at all. And the people who live in the housing development (who will be forced to move out), especially renters who probably won't be properly compensated, will care the most.

The placement of schools, the budgets of police, the design of zoning regulations (in particular "Enterprise Zones" of lower taxes to encourage business development in some areas)... these all are innately local issues.