If what you want is state-funded or charitably-funded institutions commissioning and performing new art music without reference to audience tastes, well, that's already been tried: see https://en.wikipedia.org/wiki/Darmst%C3%A4dter_Ferienkurse and so on. The results are generally considered to have been mostly not a success, both in terms of attracting an audience and of the quality of the music itself. The author of the Beethoven article happens to have written a book http://www.amazon.com/The-Rest-Noise-Listening-Twentieth/dp/... which covers this among other things.