Paying for services and infrastructure on the Idaho side is the key issue. There is a levy rate limit that restricts funds for fire protection and ambulance service outside cities. If passed, the property tax limit is imbedded, though there is an escape clause for new growth. Perhaps more important is the spending limit that applies to all local government revenues, including grant funds. This could limit the ability of local government to manage growth impacts even if it finds a way to pay for improvements.
Property tax is a limited resource, but the only broad-based authority.
There is sales tax revenue sharing, but part of that is not tied to population increases. There are limits on these resources. Revenue sources like impact fees, franchise fees, and automobile registrations are limited at the local level. Reciprocal agreements between taxing districts, or even consolidation, may increase government efficiency. For the first time, cities, counties, and highway districts can come together to decide how to distribute funds.