How nice for you, but since that money is confiscated from people at gunpoint, what about the people who either couldn't care less about a film festival or who might object to it? I know, you'll say they can vote any commissioners out of office who support it, but that's the nature of democracy, isn't it: two wolves and a sheep voting on what's for supper?
Our city and county governments currently spend tax dollars on far less fiscally wise causes, so why not contribute to a sure-fire winner like RiverRun?
I guess you never got blistered as a kid over the whole "everyone else is doing it, so why not me" school of excuses. I can't think of a dumber reason to spend money confiscated from other people than the offer that the cause you want to spend on is not as worthless as someone else's.
The government has no busines spending money on the "arts," if for no other reason than that no one can offer on objective definition of what they are. If the market is interested enough in supporting a film festival, the money will be made available for its support. There is no reason to rob the whole population so a small cadre of elites can enjoy something only they are likely to find enjoyable. This is absolutely no different than the government participating in a major league baseball stadium. It is corporate welfare, plain and simple.