@clintflint - The problem with that kind of thinking is that without arts funding we would have almost no public art at all and very little intellectual art. Unfortunately, what is beautiful and enduring is not always what sells. And what is good for people is not always what they want to spend their money on.
On top of that, there's the fact that something like an orchestra costs massive amounts of money, so if it didn't receive funding through grants, no one would be able to afford to see it. Remember it includes dozens of people who all need to be able to practice full time and travel to a performance space and maintain expensive instruments.
That's not even including all the other elements like the venue and the people who work there and so forth. If everyone who went to see the orchestra had to bear the full weight of the cost then no one would go and the whole thing would very quickly fall apart.
If you live in a society where there isn't a massive gap between rich and poor, then you need to fund the arts somehow, because otherwise they cease to exist.