Art enriches us all, we should not need to rely on the munificence of some rich dudes to have it. Government isn't some entity that controls or assists us individually, it is a manifestation of us as a community. It provides facilities that collectively we need, it provides services that are part of the operation of a civilised society, or any society for that matter, although hunter-gatherers don't set up a government, they just do things together. Likewise with art. Public art enhances public spaces, it provides a focus for us as we walk around, like a public garden or park it gives us something to sit and contemplate. The ACT government used to have a 1% levy from development projects that it placed in a public art fund. It funded commissioned sculptures that have been placed around the city of Canberra. There were objections that eventually torpedoed the scheme, but since then developers have included public art in projects they built. When you consider the scale of the enterprises that our governments are, the cost of public art is chump change, if your county or city (like our local councils or the ACT government here) stopped funding any public art it would probably save you a dollar on your property taxes. Of course we still should encourage those rich dudes to fund more of it.