Ok, I read too much into your comment, so I apologize for the "selfish" remark.
I've composed a few half-responses, but I'm wrestling with what I'm trying to articulate.
I think what it comes down to is that the issues you cite will never be fully fixed. Second, but more importantly, the amount of money required to support cultural projects is tiny compared to, say, infrastructure upgrades.
So, I object to the idea that we can't do any of that (with tax dollars) until these other things are done. In reality, if we adopt that attitude, it'll be too easy for fear-mongers to kill any cultural project.
There is the thorny issue of the government using tax dollars to fund art work that I hate, or that offends me, but one of the cultural goods I value is a tolerance of that. I.e. I don't like that, but I'm glad to live in a society that could produce it, alongside the stuff I do like.