Why don't you tell me how much you have donated to "the arts" before you demand that everyone else does so.
For context, I give 8% of my humble income to charities that feed the hungry and care for the sick. Is my dollar better spent funding a play that few will ever wish to see?
What? I'm not forcing anyone to do so nor even asking them to.
As far as I'm aware, none of us are allowed to pick and choose what our taxes go to or else I probably would give more to the arts than, say, the military.