The solution to increasing interest in local government is to strengthen the federal system (repealing the 17th amendment) & even extending it into state government (state senators should be appointed by, say, the city councils of the 24 largest municipalities in said state).
This decentralization of power would bring the peoples' focus back to their own neighborhoods, where they can actually hold government officials accountable.
That’s a recipe for corruption and minority rule. It centralizes, not decentralizes, power, in the hands of fewer people. I would advise looking to effectively any senatorial appointment from the gilded age to see why the 17th was needed: monetary exchanges for senatorial seats was widespread, race-based disenfranchisement was a reality, and in one state, Utah, a theocracy was nearly cemented. A greater focus on local rights, and greater federalist powers, should not preclude senatorial elections.