It'd be nice to be able to earmark it to particular government functions, maybe even charities in the area, etc.
"[Your Town] has finest municipal art galleries in the state whilst streets are filled with pot-holes"
Allowing people to allocate money to government functions is generally a bad idea except if very tightly limited. Things which are 'nice' will get over-funded, and things which people find unpleasant* will not getting the funding needed. I think the problem would be ten times worse if it is people who don't actual live in an area get to choose how funds are allocated.
Septic systems are a great example of this on a home scale. So many people treat them as a mysterious vortex in the ground where all sewage magically vanishes. They don’t bother to pump the tank every few years because it costs a couple hundred dollars. Then they’re shocked when their leech field is completely failed and needs to be replaced to the tune of $30k.
Maybe they have too many roads?