Ironically, the rural counties are the ones that vote for the politicians that cut taxpayer funded services (but not taxpayer funded subsidies for their farms, obviously).
I suppose neither voter is then voting in their own (financial) interests if rural voters tend to vote against rural infrastructure and urban voters tend to vote to subsidize rural infrastructure. Maybe I'm whitewashing this somewhat, but it's slightly heartening that many voters support their ideal vision of a country over their personal interests.